Population & age
- Total population
- 279
- Median age
- 43.2
Beltrami, MN (56517)
Polk County · Grand Forks, ND-MN · Population 279
Fresh.Data current as of Apr 24, 2026
Beltrami, MN (ZIP 56517) sits in Polk County within the Grand Forks metro area. The page draws on 1 federal data feed retrieved Apr 24. Top health signal: Health Insurance comes in below the national average at 7.0%. No NCES schools are mapped to this ZIP in the current dataset. 6 colleges and universities serve the area, with median in-state tuition of $5,967. IRS data shows average household income (AGI) of $74,254, well above the ~$45K national average per return. FEMA has issued 35 federal disaster declarations affecting this ZIP since 1965 — a high-frequency exposure profile. Annual average temperature is just 39.8°F per NOAA's 1991–2020 Climate Normals — a notably cold-weather climate. Only 5.6% of residents under 65 are uninsured (County Health Rankings, 2025) — well below the national county median. 33.4% of residents in this county are flagged low-access by USDA's 2025 Food Environment Atlas — a notable supermarket-access gap. Minnesota levies a graduated state income tax (top rate 9.85%); a household at the local median AGI of $74,254 would pay roughly $4,388/year before deductions. IRS migration data (2022-2023) shows a net loss of 210 residents (184 households) — the ZIP's primary county is shrinking. Healthcare access is the area's quieter strength; school options sit on the lighter side, so families may find themselves looking at districts a few ZIPs over. Notable: median household income $103,750, fair market rent of $1,000 for a two-bedroom, and a median home value of $140,900. 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
- 98.6%
- Black
- 0.0%
- Asian
- 0.0%
- Hispanic / Latino
- 1.1%
- Other / multi-racial
- 1.4%
Income & housing
- Median household income
- $103,750
- Median home value
- $140,900
Education
- Bachelor's degree or higher (age 25+)
- 19.0%
Employment
- Unemployment rate
- 2.0%
Housing
- Owner-occupied
- 84(84.0%)
- Renter-occupied
- 16(16.0%)
- Vacant units
- 23
- Built (median)
- 1938
Commute
- Public transit
- 0(0.0%)
- Work from home
- 14(10.8%)
- Avg commute
- 17.9 min
Economic wellbeing
- Below poverty line
- 24(8.6%)
- Uninsured
- 0(0.0%)
Digital access
- Broadband access
- 93(93.0%)
- No broadband
- 7(7.0%)
Language & nativity
- Foreign-born
- 1(0.4%)
- Non-English at home
- 0(0.0%)
Fair Market Rent
Fresh.HUD SAFMR · May 1, 2026Studio
$760
/month
1 Bed
$780
/month
2 Bed
$1,000
/month
3 Bed
$1,330
/month
4 Bed
$1,570
/month
HUD Fair Market Rents represent the 40th percentile of standard-quality rental housing in this area. FY2026 data.
New housing construction
New housing units permitted
50
Across 50 permitted buildings. Total construction value: $17.0M.
Single-family
50
100% of total units
Multifamily (2+ unit)
0
0% of total units
Single-family value
$17.0M
construction value
Multifamily value
$0
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
130
Average AGI
$74,254
Avg property tax
—
EITC participation
—
Income distribution
- $1 – $25,00046.2% · 60
- $25,000 – $50,0000.0% · 0
- $50,000 – $75,00030.8% · 40
- $75,000 – $100,0000.0% · 0
- $100,000 – $200,00023.1% · 30
- $200,000 or more0.0% · 0
Avg mortgage interest
—
Avg charitable contribution
—
Avg capital gains
—
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 $9.7M across all reported brackets.
Employment & wages
Average annual pay
$54,723
Average weekly wage
$1,052
Total employment
12,036
Total establishments
1,029
That is roughly 16% 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
3.1%
That is 0.9 percentage points below the US national unemployment rate of about 4.0%.
Labor force
16,278
Employed
15,771
Unemployed
507
Based on Polk County, MN 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
Grand Forks, ND--MN
Reporting agencies
1
Largest: City of Grand Forks
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
35
Date Range
1965–2023
Most Recent Declaration
SEVERE STORMS AND FLOODING
Flood — declared July 19, 2023 (DR-4722)
Incident period: April 11, 2023 – April 30, 2023
Top Incident Types
- Flood19 (54%)
- Severe Storm10 (29%)
- Biological2 (6%)
- Tornado1 (3%)
- Hurricane1 (3%)
- Other2 (6%)
Individual Assistance
15
Direct help to disaster survivors
Households Program
2
Housing & temporary lodging support
Public Assistance
35
Repair of public facilities & roads
Hazard Mitigation
14
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
39.8°F
30° – 49.6°
Annual precipitation
24.3"
Annual snowfall
49.9"
Heating · cooling days
— · 386.2
Annual base 65°F
Nearest station: RED LAKE FALLS, MN US, 26.1 miles from the centroid of Beltrami, MN (ZIP 56517)
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)
7,266
That is roughly 935 years per 100,000 below 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
14%
of adults self-report
Poor physical health days
3.8
avg per adult per month
Poor mental health days
4.9
avg per adult per month
Uninsured
5.6%
of residents under 65
Primary care MDs
55
per 100,000 residents
Preventable hospital stays
1,516
per 100K Medicare enrollees
Food environment (0-10)
8.2
10 = best access & security
Exercise access
72%
residents near a facility
Flu vaccinated
55%
of Medicare enrollees
Low birth weight (under 2,500 g) accounts for 5.4% of live births in this county — an early-life health input that downstream outcomes track against.
Based on Polk 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
Significant food access concerns
33.4% of Polk County, MN residents live more than 1 mile (urban) or 10 miles (rural) from the nearest supermarket.
Grocery stores
0.16
per 1,000 residents
Supercenters & clubs
—
per 1,000 residents
SNAP-authorized stores
0.51
accepting food benefits
Fast-food restaurants
0.49
per 1,000 residents
Among low-income residents, 8.6% 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 Polk County, MN 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 · 18 reports
Property crime rate
—
per 100K residents · 35 reports
Homicide
0
Robbery
0
Burglary
6
Vehicle theft
6
County-level data for Polk (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)
▼−210 people
−184 households • −$15.1M net AGI flow
Moved in
837households
1,552 people • $43.9M AGI
Moved out
1,021households
1,762 people • $59.1M AGI
Where new residents came from
- Grand Forks County, ND — 154 households
- Cass County, ND — 36 households
- Beltrami County, MN — 25 households
- Pennington County, MN — 25 households
- Hennepin County, MN — 24 households
Where departing residents went
- Grand Forks County, ND — 228 households
- Cass County, ND — 70 households
- Clay County, MN — 34 households
- Pennington County, MN — 32 households
- Hennepin County, MN — 30 households
Incoming households reported an average AGI of $52,499 versus departing households' $57,836.
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 Minnesota
State-level rules that apply to every resident of ZIP 56517. Numbers reflect the most recent published year per source.
Tax rates
Income tax
9.85%
graduated · 3 brackets
Sales tax (combined)
8.14%
State 6.88% · avg local 1.26%
Property tax (effective)
1.04%
Median $1,545/year
Tax burden rank
47 of 50
12.30% of personal income
For ZIP 56517: At this ZIP's median AGI of $74,254, the estimated state income tax (before deductions) runs about $4,388 per year. Applied to this ZIP's typical home value of $140,900, that works out to roughly $1,469/year in property tax.
Paid family leave
Program
Minnesota Paid Leave
Mandatory (state-run insurance)
Max weeks/year
20
Parental
12wk
Max weekly benefit
$1,423
Replacement: 90% to 0.5x SAWW + 66% to 1.0x SAWW + 55% above · job protection
Safety net
SNAP eligibility
165% FPL
Broad-Based Categorical Eligibility (raises gross income limit above federal 130% floor). No asset test.
Sources: Tax Foundation (state tax rates & brackets), Bipartisan Policy Center (paid family leave), USDA FNS (SNAP categorical eligibility).
Other ZIPs near 56517
Nearby ZIPs by distance
56568 (Nielsville, 10.5 mi) · 56581 (Shelly, 11.2 mi) · 56523 (Climax, 13.1 mi) · 56510 (Ada, 13.3 mi) · 56540 (Fertile, 13.3 mi) · 56716 (Crookston, 13.3 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
37.9%
4.9pp above the 33.0% national rate.
High Blood Pressure
30.8%
Tracks close to the 32.0% national rate.
Depression
24.0%
2.0pp above the 22.0% national rate.
Annual Checkup
75.2%
Tracks close to the 76.0% national rate.
Health Insurance
7.0%
6.0pp below the 13.0% national rate.
Diabetes
10.2%
Tracks close to the 11.0% national rate.
Colleges & universities nearby
Colleges in this area
6
Median in-state tuition
$5,967
Median earnings (10 yr)
$45,591
- 4-Year
Minnesota State University Moorhead
Moorhead, MN · 56563
- In-state tuition
- $10,428
- Out-of-state tuition
- $10,428
- Acceptance rate
- 58.8%
- Graduation rate
- 56.0%
- Median earnings (10 yr)
- $50,527
- Median student debt
- $20,000
- 2-Year
Minnesota State Community and Technical College
Fergus Falls, MN · 56537
- In-state tuition
- $5,908
- Out-of-state tuition
- $5,908
- Acceptance rate
- —
- Graduation rate
- 46.5%
- Median earnings (10 yr)
- $45,591
- Median student debt
- $12,000
- 4-Year
Concordia College at Moorhead
Moorhead, MN · 56562
- In-state tuition
- $31,170
- Out-of-state tuition
- $31,170
- Acceptance rate
- 62.6%
- Graduation rate
- 66.3%
- Median earnings (10 yr)
- $59,317
- Median student debt
- $26,847
- 2-Year
White Earth Tribal and Community College
Mahnomen, MN · 56557
- In-state tuition
- $5,490
- Out-of-state tuition
- $5,490
- Acceptance rate
- —
- Graduation rate
- 18.8%
- Median earnings (10 yr)
- $18,044
- Median student debt
- —
- 2-Year
M State - Detroit Lakes Campus
Detroit Lakes, MN · 56501
- In-state tuition
- $5,825
- Out-of-state tuition
- $5,825
- Acceptance rate
- —
- Graduation rate
- —
- Median earnings (10 yr)
- $45,591
- Median student debt
- $12,000
- 2-Year
M State - Moorhead Campus
Moorhead, MN · 56560
- In-state tuition
- $6,026
- Out-of-state tuition
- $6,026
- Acceptance rate
- —
- Graduation rate
- —
- Median earnings (10 yr)
- $45,591
- Median student debt
- $12,000
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
Beltrami, MN (ZIP 56517) sits in Polk County within the Grand Forks metro area. The page draws on 1 federal data feed retrieved Apr 24. Top health signal: Health Insurance comes in below the national average at 7.0%. No NCES schools are mapped to this ZIP in the current dataset. 6 colleges and universities serve the area, with median in-state tuition of $5,967. IRS data shows average household income (AGI) of $74,254, well above the ~$45K national average per return. FEMA has issued 35 federal disaster declarations affecting this ZIP since 1965 — a high-frequency exposure profile. Annual average temperature is just 39.8°F per NOAA's 1991–2020 Climate Normals — a notably cold-weather climate. Only 5.6% of residents under 65 are uninsured (County Health Rankings, 2025) — well below the national county median. 33.4% of residents in this county are flagged low-access by USDA's 2025 Food Environment Atlas — a notable supermarket-access gap. Minnesota levies a graduated state income tax (top rate 9.85%); a household at the local median AGI of $74,254 would pay roughly $4,388/year before deductions. IRS migration data (2022-2023) shows a net loss of 210 residents (184 households) — the ZIP's primary county is shrinking. Healthcare access is the area's quieter strength; school options sit on the lighter side, so families may find themselves looking at districts a few ZIPs over. Notable: median household income $103,750, fair market rent of $1,000 for a two-bedroom, and a median home value of $140,900. Every figure on this page links to its underlying federal dataset with a retrieval date so you can audit the freshness yourself.
The two domains pull in different directions. Healthcare access reads strong, but the on-paper school count is on the lighter side — that’s less a quality signal and more a density one. Households here often look at districts a few ZIPs over for school choice while keeping their providers local.
One concrete reading worth keeping: Depression prevalence sits higher the national rate at 24.0%. 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 56517
What is the obesity rate in ZIP 56517?
37.9%, which is 4.9 percentage points above the national average of 33.0% (CDC PLACES, retrieved Apr 24, 2026).
What is the depression rate in ZIP 56517?
24.0%, which is 2.0 percentage points above the national average of 22.0% (CDC PLACES, retrieved Apr 24, 2026).
What is the high blood pressure rate in ZIP 56517?
30.8%, which is 1.2 percentage points below the national average of 32.0% (CDC PLACES, retrieved Apr 24, 2026).
What is the population of ZIP 56517?
279 people live in ZIP 56517, with a median age of 43.2 (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What is the median household income in ZIP 56517?
$103,750 per year (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
Is ZIP 56517 mostly renters or homeowners?
In ZIP 56517, 84.0% of occupied housing units are owner-occupied and 16.0% are renter-occupied (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
How do people commute in ZIP 56517?
In ZIP 56517, 10.8% 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 56517?
8.6% of the population in ZIP 56517 lives below the federal poverty line (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What percentage of households in ZIP 56517 have broadband internet?
93.0% of households in ZIP 56517 have broadband internet access (Census ACS 5-Year 2022, retrieved Apr 30, 2026).
What is the average household income in ZIP 56517?
The average Adjusted Gross Income reported on tax returns from ZIP 56517 (Beltrami, MN) is $74,254 per return (IRS SOI Tax Year 2022, retrieved May 2, 2026).
How much do homeowners pay in property tax in ZIP 56517?
Tax returns from ZIP 56517 report an average of $0 per return in real-estate tax deductions (IRS SOI Tax Year 2022, retrieved May 2, 2026).
What percentage of residents in ZIP 56517 earn over $200,000?
0.0% of tax returns from ZIP 56517 (Beltrami, MN) report Adjusted Gross Income of $200,000 or more (IRS SOI Tax Year 2022, retrieved May 2, 2026).
How vulnerable is ZIP 56517 to disasters and public health emergencies?
According to the CDC Social Vulnerability Index (2022), ZIP 56517 ranks in the 33th percentile nationally for social vulnerability — a moderate vulnerability profile (retrieved May 3, 2026).
What is the biggest vulnerability factor in ZIP 56517?
Housing Type & Transportation is the highest-scoring CDC SVI theme for ZIP 56517, ranking in the 60th percentile nationally (CDC/ATSDR Social Vulnerability Index 2022, retrieved May 3, 2026).
How many federally declared disasters has ZIP 56517 experienced?
FEMA has recorded 35 federal disaster declarations affecting ZIP 56517 between 1965–2023 (FEMA OpenFEMA Disaster Declarations, retrieved May 3, 2026).
What kinds of disasters most often hit ZIP 56517?
Flood is the most common federally declared disaster type affecting ZIP 56517, accounting for 19 of 35 declarations (54%, FEMA OpenFEMA, retrieved May 3, 2026).
What was the most recent disaster declared for ZIP 56517?
The most recent FEMA disaster declaration affecting ZIP 56517 was "SEVERE STORMS AND FLOODING" — a flood declared in 2023 (DR-4722) (FEMA OpenFEMA, retrieved May 3, 2026).
What colleges are near ZIP 56517?
6 colleges and universities are listed near ZIP 56517 by the U.S. Department of Education College Scorecard, including Minnesota State University Moorhead, Minnesota State Community And Technical College, and Concordia College At Moorhead (retrieved May 2, 2026).
What is the average tuition at colleges near ZIP 56517?
Median in-state tuition across 6 nearby institutions is $5,967 (College Scorecard, retrieved May 2, 2026).
What do graduates earn from colleges near ZIP 56517?
Graduates of nearby colleges earn a median of $45,591 ten years after entry (College Scorecard, retrieved May 2, 2026).
What is the climate like in ZIP 56517?
ZIP 56517 has an average annual temperature of 39.8°F and 24.3" of annual precipitation based on the RED LAKE FALLS, MN US weather station 26.1 miles from the ZIP centroid (NOAA 1991–2020 Climate Normals, retrieved May 8, 2026).
Does ZIP 56517 have public transit?
Yes — ZIP 56517 is part of the Grand Forks, ND--MN urbanized area, primarily served by City of Grand Forks (National Transit Database 2024, retrieved May 4, 2026).
What taxes apply in ZIP 56517?
Minnesota has a graduated income tax with a top rate of 9.85%. Households at the local median AGI of $74,254 would pay roughly $4,388 in state income tax annually (estimated, before deductions). Combined sales tax: 8.14% (Tax Foundation 2025).
Does Minnesota have paid family leave?
Minnesota runs an active paid family leave program (Minnesota Paid Leave) offering up to 20 weeks of paid leave per year, with a maximum weekly benefit of $1,423 (Bipartisan Policy Center 2026).
What data is available for ZIP 56517?
This page covers health outcomes from CDC PLACES (40 metrics), demographics from the Census ACS 5-Year (2022), colleges from the U.S. Department of Education College Scorecard (6 institutions), income & tax statistics from the IRS SOI (Tax Year 2022), social vulnerability scores from the CDC/ATSDR SVI (2022), federal disaster declarations from FEMA OpenFEMA (35 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). 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). Social vulnerability scores retrieved May 3, 2026 from CDC/ATSDR SVI (2022). Federal disaster declarations retrieved May 3, 2026 from FEMA OpenFEMA (35 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 56517
Nearby ZIPs by distance
56568 (Nielsville, 10.5 mi) · 56581 (Shelly, 11.2 mi) · 56523 (Climax, 13.1 mi) · 56510 (Ada, 13.3 mi) · 56540 (Fertile, 13.3 mi) · 56716 (Crookston, 13.3 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 56517?
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
33rd percentile
Moderate Vulnerability
Based on 3 census tracts, population 560
Vulnerability Themes
Households Without Vehicle
7
Limited English Speakers
2
Persons with Disability
53
Without HS Diploma
21
Without Health Insurance
23
Adults Age 65+
109
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.