Census tract · Warren County
Census Tract 321, Warren County, Ohio
Census Tract 321, GEOID 39165032100, in Warren County, Ohio, mostly within Union Township, Warren County (70% of its census blocks). 10,289 residents in the ACS 2020-2024 5-year estimates (±780); the 2020 Census counted 9,917.
Residents, 2020-2024
10,289
±780 (90% margin)
2020 Census count: 9,917
Median household income
$128,125
±$24,904 (90% margin)
Warren County: $110,132
Median home value
$485,600
±$46,803 (90% margin)
Warren County: $349,400
Median gross rent
$1,354
±$270 (90% margin)
Warren County: $1,361
Where is Census Tract 321?
Census Tract 321 is one of 44 census tracts in Warren County, Ohio. It covers 18.92 square miles of land, 524 residents per square mile in 2020. Its GEOID, 39165032100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Union Township, Warren County | 70% |
| South Lebanon | 27% |
| Mason | 16% |
| Lebanon | 14% |
| Kings Mills | 2% |
9 census tracts border Census Tract 321: Tract 312 ($129,890), Tract 313 ($114,821), Tract 316.01 ($130,375), Tract 319.05 ($108,296), Tract 320.03 ($94,922), Tract 322.03 ($119,420), Tract 322.04 ($134,625), Tract 322.06 ($126,285) and Tract 323 ($96,104). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 321?
The 2020-2024 American Community Survey puts Census Tract 321's population at 10,289 (±780) in 3,515 households; the 2020 Census counted 9,917 residents and 3,544 housing units.
| Measure | Tract 321 | Union Township, Warren County |
|---|---|---|
| Total population | 10,289 ±780 | 6,437 |
| Households | 3,515 ±350 | 2,358 |
| Average household size | 2.92 ±0.22 | 2.72 |
| Housing units | 3,641 ±391 | 2,484 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 321?
The median resident of Census Tract 321 is 38.3 years old; 28.4% are under 18 and 9.4% are 65 or older. The largest group is non-Hispanic white residents at 75.4%, then non-Hispanic Asian residents at 13.0%. 12.6% of residents were born outside the United States.
| Measure | Tract 321 | Union Township, Warren County |
|---|---|---|
| Median age | 38.3 ±2.6 | 42.5 |
| Under 18 years | 28.4% ±3.2 pts | 25.9% |
| 65 years and over | 9.4% ±1.8 pts | 14.3% |
| Hispanic or Latino (any race) | 1.7% ±1.3 pts | 2.5% |
| White alone, not Hispanic | 75.4% ±5.3 pts | 82.1% |
| Black or African American alone, not Hispanic | 3.3% ±1.4 pts | 3.9% |
| Asian alone, not Hispanic | 13.0% ±2.7 pts | 2.8% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.4 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.4 pts | 0.0% |
| Two or more races, not Hispanic | 3.6% ±2.1 pts | 4.0% |
| Some other race alone, not Hispanic | 3.0% ±4.1 pts | 4.7% |
| Born outside the United States | 12.6% ±4.7 pts | 3.5% |
| Speak a language other than English at home (age 5+) | 15.6% ±5.2 pts | 4.0% |
| Civilian veterans (age 18+) | 5.4% ±1.9 pts | 6.4% |
| With a disability | 8.4% ±2.7 pts | 10.9% |
| No health insurance coverage | 2.2% ±1.6 pts | 3.3% |
| High school graduate or higher (age 25+) | 95.1% ±2.3 pts | 93.0% |
| Bachelor's degree or higher (age 25+) | 50.7% ±7.3 pts | 37.0% |
| Graduate or professional degree (age 25+) | 18.4% ±3.8 pts | 11.1% |
| Lived in the same house a year earlier | 89.5% ±4.3 pts | 86.7% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Census Tract 321 earn?
Half of the 3,515 households in Census Tract 321 earn less than $128,125 a year (±$24,904), against $110,132 across Warren County: 12th highest of the county's 43 tracts with a reliable estimate. 6.0% of residents live below the poverty line.
| Measure | Tract 321 | Union Township, Warren County |
|---|---|---|
| Median household income | $128,125 ±$24,904 | $103,205 |
| Mean household income | $220,808 ±$48,629 | $208,271 |
| Per capita income | $76,663 ±$15,298 | $76,875 |
| People below the poverty line | 6.0% ±3.1 pts | 7.2% |
| Children under 18 below the poverty line | 4.7% ±4.5 pts | 5.2% |
| Households receiving SNAP | 5.2% ±3.7 pts | 7.7% |
| Households with a computer | 98.9% ±1.1 pts | 98.3% |
| Households with a broadband subscription | 96.7% ±3.1 pts | 95.1% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Census Tract 321?
Owners occupy 82.6% of Census Tract 321's occupied homes and renters 17.4%. The median owner-occupied home is valued at $485,600 by its owner (±$46,803). The median renter pays $1,354 a month including utilities.
| Measure | Tract 321 | Union Township, Warren County |
|---|---|---|
| Median home value (owner-occupied) | $485,600 ±$46,803 | $381,500 |
| Median gross rent | $1,354 ±$270 | $1,322 |
| Renters paying 35% or more of income on rent | 21.1% ±15.8 pts | 22.3% |
| Median monthly owner costs, with a mortgage | $2,591 ±$414 | $2,099 |
| Owner-occupied homes | 82.6% ±5.2 pts | 75.3% |
| Renter-occupied homes | 17.4% ±5.2 pts | 24.7% |
| Housing units | 3,641 ±391 | 2,484 |
| Single-family detached homes | 85.9% ±5.2 pts | 79.3% |
| Mobile homes | 1.8% ±1.5 pts | 2.6% |
| Built 2020 or later | 4.4% ±2.9 pts | 3.6% |
| Built 2010 to 2019 | 37.7% ±6.7 pts | 25.6% |
| Built 1939 or earlier | 4.0% ±3.2 pts | 5.4% |
| Households with no vehicle | 3.4% ±3.2 pts | 5.1% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Census Tract 321 get to work?
75.6% of Census Tract 321's workers drive alone and 16.9% work from home. The average trip to work takes 32.5 minutes. The unemployment rate in 2020-2024 averaged 2.2%.
| Measure | Tract 321 | Union Township, Warren County |
|---|---|---|
| In the labor force (age 16+) | 71.8% ±5.0 pts | 69.9% |
| Unemployment rate | 2.2% ±1.4 pts | 3.1% |
| Drove alone to work | 75.6% ±5.4 pts | 84.4% |
| Carpooled | 5.3% ±3.1 pts | 3.4% |
| Public transportation | 0.0% ±0.7 pts | 0.0% |
| Walked | 0.0% ±0.7 pts | 0.0% |
| Worked from home | 16.9% ±4.8 pts | 9.2% |
| Mean travel time to work | 32.5 min ±5.6 | 33.4 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
How does Census Tract 321 compare with the other tracts in Warren County?
Among Warren County's tracts with a reliable estimate, Census Tract 321 ranks as shown below (1 = highest).
| Measure | In Warren County |
|---|---|
| Population | 2nd of 44 |
| Residents per square mile | 32nd of 44 |
| Median household income | 12th of 43 |
| Per capita income | 4th of 44 |
| Median home value | 4th of 43 |
| Median gross rent | 19th of 38 |
| Poverty rate | 13th of 21 |
| Bachelor's degree or higher | 16th of 42 |
| Median age | 31st of 44 |
| Owner-occupied share | 26th of 43 |
The tracts next to it on Warren County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 309.01 | 9th | $131,500±$25,738 · within the margin of this tract |
| Tract 316.01 | 10th | $130,375±$33,891 · within the margin of this tract |
| Tract 312 | 11th | $129,890±$10,388 · within the margin of this tract |
| Tract 321 | 12th | $128,125±$24,904 |
| Tract 322.06 | 13th | $126,285±$10,989 · within the margin of this tract |
| Tract 320.09 | 14th | $125,068±$28,454 · within the margin of this tract |
| Tract 322.02 | 15th | $125,067±$17,305 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 321?
1 of the 18 figures for Census Tract 321 on this page carries a coefficient of variation over 40% and is marked with a ring: they come from a small sample, so read them as rough.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections