37031 ZIP Code
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ZIP code 37031 covers Castalian Springs, Tennessee, with a population of about 3,984 and a median household income of $86,380.
- Population
- 3,984104 per square mile
- Median age
- 49.811.1 points above the US average
- Median household income
- $86,3801.3× the Tennessee median
- Poverty rate
- 6.2%6.2 points below the US average
- Typical home value
- $429,323up 35% in five years
- Degree or higher
- 21.4%13.6 points below the US average
- Homeownership
- 92.9%27.9 points above the US average
- Time zone
- Central UTC-06:00observes daylight saving time
- Businesses
- 34
Where 37031 is
Castalian Springs, Tennessee — the area the Census Bureau draws for this ZIP code. ZIP codes are sets of delivery routes rather than areas, so this is the Census approximation of one, not a Postal Service boundary.
People and households
American Community Survey 2019–2023 five-year estimates
| Population | 3,984 |
|---|---|
| Median age | 49.8 |
| Family households | 74.8% |
| Born outside the US | 1.6% |
| Speaks a language other than English at home | 2.7% |
| White (non-Hispanic) | 90.5% |
| Black (non-Hispanic) | 1.8% |
| Asian (non-Hispanic) | 0.2% |
| Hispanic or Latino | 3.4% |
| Veterans | 9.9% |
Income and poverty
American Community Survey 2019–2023 five-year estimates
| Median household income | $86,380 |
|---|---|
| Income per person | $44,811 |
| Poverty rate | 6.2% |
| Households on SNAP or cash assistance | 6.2% |
Household income distribution
| Under $10k | |
|---|---|
| $10–15k | |
| $15–20k | |
| $20–25k | |
| $25–30k | |
| $30–35k | |
| $35–40k | |
| $40–45k | |
| $45–50k | |
| $50–60k | |
| $60–75k | |
| $75–100k | |
| $100–125k | |
| $125–150k | |
| $150–200k | |
| $200k or more |
Income as declared to the IRS
Filed returns rather than survey responses, so this counts tax units and not households.
| Tax returns filed | 2,160 |
|---|---|
| Mean adjusted gross income | $76,030 |
| Returns declaring $200,000 or more | 4.2% |
| Returns, under $25k | 22.7% |
| Returns, $25k–$50k | 21.8% |
| Returns, $50k–$75k | 15.7% |
| Returns, $75k–$100k | 13.0% |
| Returns, $100k–$200k | 22.7% |
| Returns, $200k or more | 4.2% |
Housing
American Community Survey 2019–2023 five-year estimates
| Median home value | $303,200 |
|---|---|
| Rent as a share of household income | 38.4% |
| Owner-occupied | 92.9% |
| Vacant homes | 6.2% |
| Median year built | 1997 |
What the homes are
| Detached house | |
|---|---|
| Attached house | |
| Mobile home |
Home values and rents today
Zillow Home Value Index and Zillow Observed Rent Index, courtesy of Zillow. Monthly and current, where the Census figures above are a five-year average and are capped at $2,000,000.
| Typical home value | $429,323as of 2026-07 |
|---|---|
| Typical home value, 1 year | up 3.8% |
| Typical home value, 5 years | up 35% |
| Typical home value, 10 years | up 137.1% |
$111,039 in 2000 to $429,323 in 2026.
Work, commuting and education
American Community Survey 2019–2023 five-year estimates
| Unemployment rate | 0.7% |
|---|---|
| Bachelor's degree or higher | 21.4% |
| High school diploma or higher | 93% |
| Works from home | 11.5% |
| Drives to work alone | 73% |
| Takes public transport | 0% |
| Commutes 45 minutes or more | 32.8% |
Health
CDC PLACES 2025 release, model-based estimates. These are modelled small-area estimates for adults, not counts of diagnosed cases.
| Obesity | 40.5% 7.1 pts above the national average of 33.4% |
|---|---|
| Diagnosed diabetes | 12.7% 0.7 pts above the national average of 12% |
| Currently smokes | 17.6% 4.4 pts above the national average of 13.2% |
| High blood pressure | 38.6% 4.5 pts above the national average of 34.1% |
| Fair or poor general health | 20.8% 0.5 pts above the national average of 20.3% |
| No health insurance (18–64) | 10.1% 1.2 pts below the national average of 11.3% |
| Depression | 29.8% 7.9 pts above the national average of 21.9% |
| No leisure-time physical activity | 24.9% 0.5 pts below the national average of 25.4% |
| Arthritis | 33% 7.9 pts above the national average of 25.1% |
| Binge drinking | 15% 1 pts below the national average of 16% |
| Taking blood pressure medication | 76.7% 2 pts above the national average of 74.7% |
| Cancer (non-skin) | 9% 1.3 pts above the national average of 7.7% |
| Current asthma | 10.8% same as the national average of 10.4% |
| Coronary heart disease | 6.8% 0.6 pts above the national average of 6.2% |
| Routine check-up in past year | 77.7% 1 pts above the national average of 76.7% |
| Cholesterol screening | 88.1% 2.2 pts above the national average of 85.9% |
| Cognitive disability | 16.6% 1.8 pts above the national average of 14.8% |
| Colorectal screening | 65.3% 1 pts above the national average of 64.3% |
| COPD | 8.4% 1.8 pts above the national average of 6.6% |
| Visited a dentist | 60.6% 0.7 pts below the national average of 61.3% |
| Any disability | 34.5% 3.8 pts above the national average of 30.7% |
| Hearing disability | 7.7% 1 pts above the national average of 6.7% |
| High cholesterol | 40.8% 4.6 pts above the national average of 36.2% |
| Independent living disability | 8.5% same as the national average of 8.4% |
| Mammography use | 74.8% 1.1 pts below the national average of 75.9% |
| Poor mental health (14+ days) | 18.9% 2.1 pts above the national average of 16.8% |
| Mobility disability | 15.2% 1.2 pts above the national average of 14% |
| Poor physical health (14+ days) | 15% 1.5 pts above the national average of 13.5% |
| Self-care disability | 3.6% same as the national average of 4% |
| Sleeps under 7 hours | 37.8% 1.4 pts above the national average of 36.4% |
| Stroke | 3.5% same as the national average of 3.4% |
| All natural teeth lost | 12.9% same as the national average of 13% |
| Vision disability | 4.6% 1 pts below the national average of 5.6% |
Business and employment
Census ZIP Code Business Patterns 2022
| Business establishments | 34 |
|---|---|
| People employed | 160 |
| Annual payroll | $5,490,000 |
Natural hazard risk
FEMA National Risk Index, estimated for this ZIP code from census tract data — the NRI is not published per ZIP.
| Overall risk | Higher than 66.4% of US census tracts |
|---|---|
| FEMA rating | Relatively Moderate |
| Expected annual loss | 67.2 out of 100 |
| Community resilience | 38.7 out of 100 |
By hazard
Score is out of 100 and is the area-weighted average across the census tracts this ZIP code covers. The rating beside it is the highest any one of those tracts carries.
| Tornado | 89.1Very High at its worst in this ZIP code |
|---|---|
| Strong wind | 88.4Very High at its worst in this ZIP code |
| Cold wave | 87.2Relatively High at its worst in this ZIP code |
| Drought | 86.6Relatively Low at its worst in this ZIP code |
| Ice storm | 82.9Relatively Moderate at its worst in this ZIP code |
| Winter weather | 82.6Relatively High at its worst in this ZIP code |
| Hail | 78.5Relatively Moderate at its worst in this ZIP code |
| River flooding | 73.4Relatively High at its worst in this ZIP code |
| Earthquake | 73.3Relatively Low at its worst in this ZIP code |
| Lightning | 73.2Relatively High at its worst in this ZIP code |
| Wildfire | 66.3Very Low at its worst in this ZIP code |
| Landslide | 64Relatively Low at its worst in this ZIP code |
| Heat wave | 44.9Relatively Moderate at its worst in this ZIP code |
| Hurricane | 28.4Very Low at its worst in this ZIP code |
Compared with Tennessee and the United States
State and national columns are figures for those areas, not for this ZIP code. American Community Survey 2019–2023 five-year estimates
| This ZIP | Tennessee | United States | |
|---|---|---|---|
| Median household income | $86,380 | $67,097 | $78,538 |
| Income per person | $44,811 | $37,866 | $43,289 |
| Poverty rate | 6.2% | 13.8% | 12.4% |
| Median home value | $303,200 | $256,800 | $303,400 |
| Median gross rent | — | $1,122 | $1,348 |
| Homeownership | 92.9% | 67% | 65% |
| Bachelor's degree or higher | 21.4% | 30.4% | 35% |
| Unemployment rate | 0.7% | 4.7% | 5.2% |
| Works from home | 11.5% | 11.4% | 13.5% |
| Born outside the US | 1.6% | 5.9% | 13.9% |
| Median age | 49.8 | 38.9 | 38.7 |
Climate
NOAA US Climate Normals 1991-2020, from the nearest weather station with a full year of records. The station and its distance are named above, because a station forty kilometres away describes somewhere else.
| Weather station | BETHPAGE 1 S, TN US8.7 km away |
|---|---|
| Rain in a year | 55 in |
| Snow in a year | 5 in |
Average high and low by month
| January | 45.2°F / 25.3°F4.41 in rain, 2.3 in snow |
|---|---|
| February | 50.2°F / 27.7°F4.71 in rain, 1.5 in snow |
| March | 59.1°F / 34.4°F4.91 in rain, 0.3 in snow |
| April | 68.8°F / 42.9°F5.16 in rain |
| May | 77°F / 53.3°F5.72 in rain |
| June | 84.4°F / 62.4°F4.6 in rain |
| July | 87.7°F / 66.6°F5.17 in rain |
| August | 87.2°F / 64.7°F3.82 in rain |
| September | 81.7°F / 57.3°F3.74 in rain |
| October | 70.9°F / 43.9°F3.81 in rain |
| November | 58.5°F / 33.8°F3.9 in rain |
| December | 48.8°F / 28.4°F5.01 in rain, 0.5 in snow |
Access to food
USDA Food Access Research Atlas, estimated for this ZIP code from census tract data. Each figure is the share of the ZIP code's land area that falls in a tract carrying that flag.
| Low income and far from a supermarket | None of this ZIP code |
|---|---|
| Far from a supermarket | None of this ZIP code |
| No vehicle and far from a supermarket | None of this ZIP code |
School districts
NCES Geographic Relationship File 2025, which states the association between each district and each ZIP code tabulation area directly. Elementary and secondary districts can cover the same ground, so shares need not total 100%.
This ZIP code is served by 2 school districts, so the address decides which one, not the ZIP code.
| Sumner County School District | 78.2% of this ZIP code's land area |
|---|---|
| Trousdale County School District | 21.8% of this ZIP code's land area |
Community and walkability
CDC/ATSDR Social Vulnerability Index 2022 and the EPA National Walkability Index, both estimated for this ZIP code from census tract data. Vulnerability figures are national percentile ranks, not measurements.
| Overall social vulnerability | 27more vulnerable than 27% of US census tracts |
|---|---|
| Socioeconomic status | 37more vulnerable than 37% of US census tracts |
| Household characteristics | 28more vulnerable than 28% of US census tracts |
| Racial and ethnic minority status | 26more vulnerable than 26% of US census tracts |
| Housing type and transport | 32more vulnerable than 32% of US census tracts |
| Walkability | 3.4 out of 20Least walkable |
Nearby ZIP codes
The closest ZIP codes by centre point, which is not the same as sharing a border.
| 37066 Gallatin, TN | 12.6 km away |
|---|---|
| 37074 Hartsville, TN | 12.7 km away |
| 37022 Bethpage, TN | 15.3 km away |
| 37087 Lebanon, TN | 19 km away |
| 37088 Lebanon, TN | 19.3 km away |
| 37186 Westmoreland, TN | 22.7 km away |
| 37057 Dixon Springs, TN | 24.1 km away |
| 37071 Gladeville, TN | 25 km away |
Location, counties and time zone
County shares from Census 2020 ZCTA relationship files. Time zone from the USDOT National Transportation Atlas, which renders the boundaries written into 49 CFR Part 71.
| Sumner County | 78.2% of this ZIP code's land area |
|---|---|
| Trousdale County | 21.8% of this ZIP code's land area |
| Time zone | Central (UTC-06:00 standard) |
| Daylight saving time | Observed |
| Land area | 38.25 sq mi |
| Water area | 1.76 sq mi |
| Population density | 104 people per sq mi |
| Latitude, longitude | 36.3806, -86.3107 |
Figures are published for this ZIP code or its Census tabulation area unless a section says otherwise. Estimates whose margin of error made them unreliable are omitted rather than shown. Sources: US Census Bureau, CDC, IRS.