Population & age
- Total population
- 2,631
- Median age
- 32.3
San Marcos, TX (78656)
Caldwell County · Austin-Round Rock-San Marcos, TX · Population 2,631
Fresh.Data current as of Apr 24, 2026
San Marcos, TX (ZIP 78656) sits in Caldwell County within the Austin-Round Rock-San Marcos metro area. The page draws on 1 federal data feed retrieved Apr 24. Top health signal: Health Insurance comes in above the national average at 27.5%. No NCES schools are mapped to this ZIP in the current dataset. 7 colleges and universities serve the area, with median in-state tuition of $17,597. 21% of returns claim the Earned Income Tax Credit (IRS), a higher share than most ZIPs. CDC's Social Vulnerability Index places this ZIP in the 76th percentile nationally — a highly vulnerable community profile. FEMA has issued 32 federal disaster declarations affecting this ZIP since 1970 — a high-frequency exposure profile. 22.8% of residents under 65 lack health insurance per the 2025 County Health Rankings — a notable access gap. Texas has no state income tax, saving the local median household (AGI $57,528) approximately $2,646/year vs the US average effective state tax rate. IRS migration data (2022-2023) shows a net gain of 1,543 residents (735 households) — the ZIP's primary county is growing. Both healthcare access and on-paper school density skew lighter than national norms; what shows up here is a snapshot, not a verdict — neighborhood-level texture matters at this scale. Notable: median household income $56,923, fair market rent of $1,760 for a two-bedroom, and a typical home value of $261,412, down 5.4% over the past year. Every figure on this page links to its underlying federal dataset with a retrieval date so you can audit the freshness yourself.
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Demographics
Race & ethnicity
- White
- 59.9%
- Black
- 4.7%
- Asian
- 0.0%
- Hispanic / Latino
- 80.4%
- Other / multi-racial
- 35.4%
Income & housing
- Median household income
- $56,923
Education
- Bachelor's degree or higher (age 25+)
- 7.6%
Employment
- Unemployment rate
- 2.1%
Housing
- Owner-occupied
- 535(60.7%)
- Renter-occupied
- 347(39.3%)
- Vacant units
- 15
- Built (median)
- 1994
Commute
- Public transit
- 0(0.0%)
- Work from home
- 22(1.7%)
- Avg commute
- 25.1 min
Economic wellbeing
- Below poverty line
- 497(18.9%)
- Uninsured
- 73(2.8%)
Digital access
- Broadband access
- 650(73.7%)
- No broadband
- 232(26.3%)
Language & nativity
- Foreign-born
- 444(16.9%)
- Non-English at home
- 1,202(53.3%)
Fair Market Rent
Fresh.HUD SAFMR · May 1, 2026Studio
$1,400
/month
1 Bed
$1,490
/month
2 Bed
$1,760
/month
3 Bed
$2,240
/month
4 Bed
$2,600
/month
HUD Fair Market Rents represent the 40th percentile of standard-quality rental housing in this area. FY2026 data.
Home values
Typical home value
$261,412
Zillow Home Value Index (ZHVI) · as of March 2026
Year-over-year change
-5.4%
vs. March 2025
5-year change
+7.4%
vs. March 2021
Metro area
Austin-Round Rock-Georgetown, TX
Metropolitan statistical area
Source: Zillow Research, ZHVI All Homes (SFR, Condo/Co-op) Time Series (zillow.com/research/data). Zillow Home Value Index (ZHVI) is copyrighted by Zillow, Inc.
New housing construction
New housing units permitted
5,934
Across 4,498 permitted buildings. Total construction value: $1.45B.
Single-family
4,433
75% of total units
Multifamily (2+ unit)
1,501
25% of total units
Single-family value
$1.29B
construction value
Multifamily value
$160.7M
construction value
Aggregated from 2 counties touching this ZIP (2024).
Source: U.S. Census Bureau Building Permits Survey (census.gov/construction/bps). Public domain. BPS reports annual residential building permits from local permit-issuing jurisdictions, aggregated to county. A permit reflects intent to build, not a completed unit — actual construction lags by 6-24 months for multifamily projects.
Income & tax statistics
Tax returns filed
1,890
Average AGI
$57,528
Avg property tax
$134
EITC participation
21.2%
Income distribution
- $1 – $25,00027.5% · 520
- $25,000 – $50,00029.6% · 560
- $50,000 – $75,00020.6% · 390
- $75,000 – $100,0009.5% · 180
- $100,000 – $200,00011.1% · 210
- $200,000 or more1.6% · 30
Avg mortgage interest
$344
Avg charitable contribution
$107
Avg capital gains
$3,063
Avg total income tax
—
Source: IRS Statistics of Income — Individual Income Tax Statistics by ZIP Code (irs.gov). Public domain. Dollar columns reported in thousands by the IRS; figures here display real dollars. Total ZCTA AGI for the area was $108.7M across all reported brackets.
Business & employment
Business establishments
34
Total employment
303
Annual payroll
$13.0M
Average annual pay
$42,832
Source: U.S. Census Bureau, ZIP Business Patterns (census.gov). Public domain. ZBP covers establishments with paid employees; Census suppresses employment and payroll values when fewer employers operate in a ZIP than would protect their confidentiality.
Employment & wages
Average annual pay
$52,985
Average weekly wage
$1,019
Total employment
10,350
Total establishments
887
That is roughly 19% below the US national average of $65,470 per worker.
Source: U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages (bls.gov/cew). Public domain. QCEW is derived from state unemployment-insurance filings and covers ~95% of US jobs. Figures are county-level totals assigned to ZIPs whose primary county matches; small-employer cells are suppressed by BLS to protect employer confidentiality.
Unemployment
Unemployment rate
3.6%
That is 0.4 percentage points below the US national unemployment rate of about 4.0%.
Labor force
24,820
Employed
23,925
Unemployed
895
Based on Caldwell County, TX data (2024).
Source: U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics (bls.gov/lau). Public domain. LAUS publishes monthly and annual labor-force estimates for every US county. Figures are county-level totals assigned to ZIPs whose primary county matches.
Public transit
FTA tracks transit service at the urbanized-area level. Numbers below reflect the agencies and modes serving the area that contains this ZIP, not stop-level coverage.
Service status
Available
Austin, TX
Reporting agencies
4
Largest: Capital Metropolitan Transportation Authority
Annual ridership
—
unlinked trips · 2024
Source: U.S. Federal Transit Administration, National Transit Database (transit.dot.gov). Public domain.
Federal Disaster Declarations
Federally Declared Disasters
32
Date Range
1970–2024
Most Recent Declaration
SEVERE STORMS, STRAIGHT-LINE WINDS, TORNADOES, AND FLOODING
Flood — declared May 17, 2024 (DR-4781)
Incident period: April 26, 2024 – June 5, 2024
Top Incident Types
- Fire10 (31%)
- Flood7 (22%)
- Hurricane4 (13%)
- Severe Storm4 (13%)
- Severe Ice Storm2 (6%)
- Other5 (16%)
Individual Assistance
7
Direct help to disaster survivors
Households Program
7
Housing & temporary lodging support
Public Assistance
29
Repair of public facilities & roads
Hazard Mitigation
15
Funding to reduce future disaster risk
FEMA declares disasters at the county level; counts here include every federally declared disaster touching any county that overlaps this ZIP. Statewide declarations and pre-1964 records without county granularity are excluded. Program flags reflect which FEMA assistance categories were activated (Individual Assistance, Households, Public Assistance, Hazard Mitigation). Source: fema.gov/openfema. Public domain.
Climate
30-year averages (1991-2020) from the nearest GHCN-D weather station. Temperature and precipitation values reflect typical annual conditions, not any single year.
Avg. temperature
68.6°F
57.2° – 80.1°
Annual precipitation
36.6"
Diurnal range
22.9°F
Day-night swing
Heating · cooling days
1,620.1 · 2,973.7
Annual base 65°F
Nearest station: SAN MARCOS, TX US, 8.6 miles from the centroid of San Marcos, TX (ZIP 78656)
Source: NOAA National Centers for Environmental Information, 1991–2020 U.S. Climate Normals (ncei.noaa.gov). Public domain.
Community health profile
Years of potential life lost (per 100K)
9,139
That is roughly 939 years per 100,000 above the national county median (~8,200).
Premature death is the headline composite outcome CHR reports — age-adjusted, all-cause, before age 75.
Fair or poor health
25%
of adults self-report
Poor physical health days
4.7
avg per adult per month
Poor mental health days
5.7
avg per adult per month
Uninsured
22.8%
of residents under 65
Primary care MDs
26
per 100,000 residents
Preventable hospital stays
3,158
per 100K Medicare enrollees
Food environment (0-10)
7.1
10 = best access & security
Exercise access
40%
residents near a facility
Flu vaccinated
41%
of Medicare enrollees
Low birth weight (under 2,500 g) accounts for 8.4% of live births in this county — an early-life health input that downstream outcomes track against.
Based on Caldwell data (2025 CHR release).
Source: County Health Rankings & Roadmaps, University of Wisconsin Population Health Institute (countyhealthrankings.org). Annual release. Underlying source datasets vary by measure (CDC BRFSS, NCHS Vital Statistics, AHA, USDA Food Environment Atlas, and others). Figures are county-level and assigned to every ZIP whose primary county matches.
Food access
Food access status
Moderate food access challenges
17.5% of Caldwell County, TX residents live more than 1 mile (urban) or 10 miles (rural) from the nearest supermarket.
Grocery stores
0.14
per 1,000 residents
Supercenters & clubs
—
per 1,000 residents
SNAP-authorized stores
0.87
accepting food benefits
Fast-food restaurants
0.52
per 1,000 residents
Among low-income residents, 6.9% are low-access — those without a supermarket within 1 mile (urban) or 10 miles (rural).
Per-1,000 figures show how many of each store type exist in Caldwell County, TX for every 1,000 residents. Higher grocery and supercenter density usually means easier access to fresh food; higher convenience-store-only density (with low grocery rate) often signals a food swamp.
Source: USDA Economic Research Service, Food Environment Atlas (ers.usda.gov). County-level metrics fanned to ZIP via the primary county in the Census ZCTA-county relationship file. Variable years differ per family (stores ~2020, low-access ~2019).
Safety
FBI publishes crime data at the county level. Numbers below cover the primary county that contains this ZIP. Rates are per 100,000 residents in the area covered by reporting agencies.
Violent crime rate
—
per 100K residents · 39 reports
Property crime rate
—
per 100K residents · 151 reports
Homicide
1
Robbery
3
Burglary
35
Vehicle theft
49
County-level data for Caldwell (2024)
Source: U.S. Federal Bureau of Investigation, Uniform Crime Reporting Program (cde.ucr.cjis.gov). Public domain. Coverage varies by reporting agency; areas with partial agency coverage may understate true crime totals.
Who’s moving in and out
Net migration (2022-2023)
▲+1,543 people
+735 households • +$49.1M net AGI flow
Moved in
2,318households
4,526 people • $130.8M AGI
Moved out
1,583households
2,983 people • $81.6M AGI
Where new residents came from
- Travis County, TX — 681 households
- Hays County, TX — 495 households
- Bastrop County, TX — 103 households
- Williamson County, TX — 90 households
- Guadalupe County, TX — 69 households
Where departing residents went
- Hays County, TX — 315 households
- Travis County, TX — 251 households
- Guadalupe County, TX — 102 households
- Bastrop County, TX — 84 households
- Bexar County, TX — 64 households
Incoming households reported an average AGI of $56,407 versus departing households' $51,561.
Source: U.S. Internal Revenue Service, Statistics of Income, Migration Data (irs.gov). Public domain. Migration is measured by year-over-year changes in the address on individual tax returns; figures are county-level totals attributed to ZIPs whose primary county matches. Foreign migration contributes to inflow/outflow totals but does not appear in the top-county lists. Small flows are suppressed by IRS to protect taxpayer confidentiality.
Taxes & benefits in Texas
State-level rules that apply to every resident of ZIP 78656. Numbers reflect the most recent published year per source.
Tax rates
Income tax
None
No state income tax
Sales tax (combined)
8.20%
State 6.25% · avg local 1.95%
Property tax (effective)
1.42%
Median $1,254/year
Tax burden rank
4 of 50
8.40% of personal income
For ZIP 78656: A household at this ZIP's median AGI of $57,528 keeps approximately $2,646 more annually than residents of the typical income-tax state. Applied to this ZIP's typical home value of $261,412, that works out to roughly $3,721/year in property tax.
Paid family leave
Program
Voluntary (private insurance framework)
Voluntary (private insurance framework)
Safety net
SNAP eligibility
165% FPL
Broad-Based Categorical Eligibility (raises gross income limit above federal 130% floor). Asset limit $5,000.
Sources: Tax Foundation (state tax rates & brackets), Bipartisan Policy Center (paid family leave), USDA FNS (SNAP categorical eligibility).
Other ZIPs near 78656
Other ZIPs in San Marcos
Nearby ZIPs by distance
78640 (Kyle, 6.3 mi) · 78655 (Martindale, 6.3 mi) · 78644 (Lockhart, 8.3 mi) · 78622 (8.6 mi) · 78670 (Staples, 10 mi) · 78666 (San Marcos, 10.7 mi)
Compare ZIP-level stats — population, schools, housing, climate — across nearby areas. Source: U.S. Census Bureau ZCTA basemap.
Data sources used on this page
All data on this page is sourced from federal government datasets · Not AI-generated · Methodology
Health profile
Crude prevalence estimates from CDC PLACES, derived from BRFSS small-area modeling. Population-level figures only.
Obesity
43.1%
10.1pp above the 33.0% national rate.
High Blood Pressure
34.9%
2.9pp above the 32.0% national rate.
Depression
20.8%
Tracks close to the 22.0% national rate.
Annual Checkup
72.4%
3.6pp below the 76.0% national rate.
Health Insurance
27.5%
14.5pp above the 13.0% national rate.
Diabetes
15.4%
4.4pp above the 11.0% national rate.
Colleges & universities nearby
Colleges in this area
7
Median in-state tuition
$17,597
Median earnings (10 yr)
$56,878
- 4-Year
Texas State University
San Marcos, TX · 78666
- In-state tuition
- $11,450
- Out-of-state tuition
- $22,930
- Acceptance rate
- 89.3%
- Graduation rate
- 55.7%
- Median earnings (10 yr)
- $56,906
- Median student debt
- $21,000
- 4-Year
Southwestern University
Georgetown, TX · 78626
- In-state tuition
- $53,813
- Out-of-state tuition
- $53,813
- Acceptance rate
- 43.0%
- Graduation rate
- 71.2%
- Median earnings (10 yr)
- $56,878
- Median student debt
- $25,000
- 4-Year
Galen Health Institutes-Austin Campus
Round Rock, TX · 78681
- In-state tuition
- $17,048
- Out-of-state tuition
- $17,048
- Acceptance rate
- —
- Graduation rate
- —
- Median earnings (10 yr)
- $61,480
- Median student debt
- $24,166
- 4-Year
South University-Austin
Round Rock, TX · 78681
- In-state tuition
- $18,145
- Out-of-state tuition
- $18,145
- Acceptance rate
- —
- Graduation rate
- 8.9%
- Median earnings (10 yr)
- $34,421
- Median student debt
- $26,123
- Certificate
Central Texas Beauty College-Round Rock
Round Rock, TX · 78664
- In-state tuition
- —
- Out-of-state tuition
- —
- Acceptance rate
- —
- Graduation rate
- 72.1%
- Median earnings (10 yr)
- $23,338
- Median student debt
- —
- Certificate
Total Transformation Institute of Cosmetology
San Marcos, TX · 78666
- In-state tuition
- —
- Out-of-state tuition
- —
- Acceptance rate
- —
- Graduation rate
- 75.0%
- Median earnings (10 yr)
- —
- Median student debt
- $7,917
- Certificate
The Salon Professional Academy-Georgetown
Georgetown, TX · 78626
- In-state tuition
- —
- Out-of-state tuition
- —
- Acceptance rate
- —
- Graduation rate
- 62.1%
- Median earnings (10 yr)
- —
- Median student debt
- —
Source: U.S. Department of Education College Scorecard (collegescorecard.ed.gov). Public domain data. Earnings figures reflect median earnings 10 years after entry for federally-aided students.
What these numbers say together
San Marcos, TX (ZIP 78656) sits in Caldwell County within the Austin-Round Rock-San Marcos metro area. The page draws on 1 federal data feed retrieved Apr 24. Top health signal: Health Insurance comes in above the national average at 27.5%. No NCES schools are mapped to this ZIP in the current dataset. 7 colleges and universities serve the area, with median in-state tuition of $17,597. 21% of returns claim the Earned Income Tax Credit (IRS), a higher share than most ZIPs. CDC's Social Vulnerability Index places this ZIP in the 76th percentile nationally — a highly vulnerable community profile. FEMA has issued 32 federal disaster declarations affecting this ZIP since 1970 — a high-frequency exposure profile. 22.8% of residents under 65 lack health insurance per the 2025 County Health Rankings — a notable access gap. Texas has no state income tax, saving the local median household (AGI $57,528) approximately $2,646/year vs the US average effective state tax rate. IRS migration data (2022-2023) shows a net gain of 1,543 residents (735 households) — the ZIP's primary county is growing. Both healthcare access and on-paper school density skew lighter than national norms; what shows up here is a snapshot, not a verdict — neighborhood-level texture matters at this scale. Notable: median household income $56,923, fair market rent of $1,760 for a two-bedroom, and a typical home value of $261,412, down 5.4% over the past year. Every figure on this page links to its underlying federal dataset with a retrieval date so you can audit the freshness yourself.
Both surfaces skew lighter than national averages. That isn’t a verdict — small-area estimates compress real neighborhood-level texture, and a single ZIP reading can miss a district line or a hospital corridor sitting just outside it. Treat this as a starting point for fieldwork, not a conclusion.
One concrete reading worth keeping: Depression prevalence sits near the national rate at 20.8%. Each figure on this page links to the original federal dataset with its retrieval date — this synthesis is a reading, not a substitute for the underlying records.
Frequently Asked Questions — ZIP 78656
What is the obesity rate in ZIP 78656?
43.1%, which is 10.1 percentage points above the national average of 33.0% (CDC PLACES, retrieved Apr 24, 2026).
What is the depression rate in ZIP 78656?
20.8%, which is 1.2 percentage points below the national average of 22.0% (CDC PLACES, retrieved Apr 24, 2026).
What is the high blood pressure rate in ZIP 78656?
34.9%, which is 2.9 percentage points above the national average of 32.0% (CDC PLACES, retrieved Apr 24, 2026).
What is the population of ZIP 78656?
2,631 people live in ZIP 78656, with a median age of 32.3 (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What is the median household income in ZIP 78656?
$56,923 per year (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
Is ZIP 78656 mostly renters or homeowners?
In ZIP 78656, 60.7% of occupied housing units are owner-occupied and 39.3% are renter-occupied (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
How do people commute in ZIP 78656?
In ZIP 78656, 1.7% of workers work from home. Public transit is used by 0.0% of commuters (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What is the poverty rate in ZIP 78656?
18.9% of the population in ZIP 78656 lives below the federal poverty line (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What percentage of households in ZIP 78656 have broadband internet?
73.7% of households in ZIP 78656 have broadband internet access (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What is the typical home value in ZIP 78656?
The typical home value in ZIP 78656 is $261,412, down 5.4% from a year ago (Zillow Home Value Index, retrieved May 1, 2026).
Are home values rising or falling in ZIP 78656?
Home values are down 5.4% over the past year and up 7.4% over the past five years (Zillow Home Value Index, retrieved May 1, 2026).
What is the average household income in ZIP 78656?
The average Adjusted Gross Income reported on tax returns from ZIP 78656 (San Marcos, TX) is $57,528 per return (IRS SOI Tax Year 2022, retrieved May 2, 2026).
How much do homeowners pay in property tax in ZIP 78656?
Tax returns from ZIP 78656 report an average of $134 per return in real-estate tax deductions (IRS SOI Tax Year 2022, retrieved May 2, 2026).
What percentage of residents in ZIP 78656 earn over $200,000?
1.6% of tax returns from ZIP 78656 (San Marcos, TX) report Adjusted Gross Income of $200,000 or more (IRS SOI Tax Year 2022, retrieved May 2, 2026).
How many businesses are in ZIP 78656?
As of 2022, 34 business establishments operated in ZIP 78656 employing 303 workers (Census ZIP Business Patterns, retrieved May 3, 2026).
What is the average salary in ZIP 78656?
The average annual pay across all local establishments in ZIP 78656 is $42,832, based on Census ZIP Business Patterns 2022 data (retrieved May 3, 2026).
How vulnerable is ZIP 78656 to disasters and public health emergencies?
According to the CDC Social Vulnerability Index (2022), ZIP 78656 ranks in the 76th percentile nationally for social vulnerability — a very high vulnerability profile (retrieved May 3, 2026).
What is the biggest vulnerability factor in ZIP 78656?
Housing Type & Transportation is the highest-scoring CDC SVI theme for ZIP 78656, ranking in the 79th percentile nationally (CDC/ATSDR Social Vulnerability Index 2022, retrieved May 3, 2026).
How many federally declared disasters has ZIP 78656 experienced?
FEMA has recorded 32 federal disaster declarations affecting ZIP 78656 between 1970–2024 (FEMA OpenFEMA Disaster Declarations, retrieved May 3, 2026).
What kinds of disasters most often hit ZIP 78656?
Fire is the most common federally declared disaster type affecting ZIP 78656, accounting for 10 of 32 declarations (31%, FEMA OpenFEMA, retrieved May 3, 2026).
What was the most recent disaster declared for ZIP 78656?
The most recent FEMA disaster declaration affecting ZIP 78656 was "SEVERE STORMS, STRAIGHT-LINE WINDS, TORNADOES, AND FLOODING" — a flood declared in 2024 (DR-4781) (FEMA OpenFEMA, retrieved May 3, 2026).
What colleges are near ZIP 78656?
7 colleges and universities are listed near ZIP 78656 by the U.S. Department of Education College Scorecard, including Texas State University, Southwestern University, and Galen Health Institutes-Austin Campus (retrieved May 2, 2026).
What is the average tuition at colleges near ZIP 78656?
Median in-state tuition across 7 nearby institutions is $17,597 (College Scorecard, retrieved May 2, 2026).
What do graduates earn from colleges near ZIP 78656?
Graduates of nearby colleges earn a median of $56,878 ten years after entry (College Scorecard, retrieved May 2, 2026).
What is the climate like in ZIP 78656?
ZIP 78656 has an average annual temperature of 68.6°F and 36.5" of annual precipitation based on the SAN MARCOS, TX US weather station 8.6 miles from the ZIP centroid (NOAA 1991–2020 Climate Normals, retrieved May 8, 2026).
Does ZIP 78656 have public transit?
Yes — ZIP 78656 is part of the Austin, TX urbanized area, primarily served by Capital Metropolitan Transportation Authority (National Transit Database 2024, retrieved May 4, 2026).
What taxes apply in ZIP 78656?
Texas has no state income tax. For a household earning the local median AGI of $57,528, this saves approximately $2,646 per year compared to the national average effective state tax rate. The combined state and local sales tax rate is 8.20% (Tax Foundation 2025).
Does Texas have paid family leave?
Texas runs an active paid family leave program offering up to — weeks of paid leave per year (Bipartisan Policy Center 2026).
What data is available for ZIP 78656?
This page covers health outcomes from CDC PLACES (33 metrics), demographics from the Census ACS 5-Year (2022), home values from the Zillow Home Value Index, colleges from the U.S. Department of Education College Scorecard (7 institutions), income & tax statistics from the IRS SOI (Tax Year 2022), local business & employment from Census ZIP Business Patterns (2022), social vulnerability scores from the CDC/ATSDR SVI (2022), federal disaster declarations from FEMA OpenFEMA (32 on record), climate normals from NOAA NCEI (1991-2020), county-level crime data from the FBI Crime Data Explorer (2024), public transit coverage from the National Transit Database (2024), and state-level tax rates from the Tax Foundation. Data is refreshed on Mubboo's standard schedule.
How current is this data?
Health data retrieved Apr 24, 2026 from CDC PLACES. Demographics retrieved Apr 30, 2026 from Census ACS 5-Year (2022). Home values retrieved May 1, 2026 from Zillow Research. College data retrieved May 2, 2026 from U.S. Dept of Education College Scorecard. Income & tax statistics retrieved May 2, 2026 from IRS SOI (Tax Year 2022). Business & employment retrieved May 3, 2026 from Census ZBP (2022). Social vulnerability scores retrieved May 3, 2026 from CDC/ATSDR SVI (2022). Federal disaster declarations retrieved May 3, 2026 from FEMA OpenFEMA (32 on record). Climate normals retrieved May 8, 2026 from NOAA NCEI (1991-2020). County-level crime data retrieved May 4, 2026 from the FBI Crime Data Explorer (2024). Transit coverage retrieved May 4, 2026 from the National Transit Database (2024). State-level tax rates retrieved 2026-05-05 15:58:22.284+00 from the Tax Foundation.
Other ZIPs near 78656
Other ZIPs in San Marcos
Nearby ZIPs by distance
78640 (Kyle, 6.3 mi) · 78655 (Martindale, 6.3 mi) · 78644 (Lockhart, 8.3 mi) · 78622 (8.6 mi) · 78670 (Staples, 10 mi) · 78666 (San Marcos, 10.7 mi)
Compare ZIP-level stats — population, schools, housing, climate — across nearby areas. Source: U.S. Census Bureau ZCTA basemap.
More Info topics
Have a specific question about ZIP 78656?
Ask Mubboo — launching Q4 2026.
Data refreshed via Mubboo's ETL pipeline; oldest source on this page retrieved Apr 24, 2026.
Social Vulnerability Index
Overall SVI
76th percentile
Very High Vulnerability
Based on 5 census tracts, population 3,000
Vulnerability Themes
Households Without Vehicle
14
Limited English Speakers
194
Persons with Disability
441
Without HS Diploma
345
Without Health Insurance
896
Adults Age 65+
252
The Social Vulnerability Index uses U.S. Census data to identify communities most at risk during public health emergencies and natural disasters. Higher percentiles indicate greater vulnerability. Tract-level scores are aggregated to this ZCTA via Census 2020 ZCTA→Tract crosswalk, weighted by land-area share. Source: atsdr.cdc.gov. Public domain.