Township · Ohio
St. Clair Township, Butler County, Ohio
St. Clair Township, Butler County, township, in Butler County, Ohio. St. Clair Township, Butler County had 6,940 residents on July 1, 2025 by the Census Bureau's estimate, up 3.5% since 2020; the 2020 Census counted 6,671 and the ACS 2020-2024 5-year estimates put it at 6,768 (±21). GEOID 3901769498.
Residents, July 2025 estimate
6,940
Census Bureau estimate (no margin published)
2020 Census count: 6,671 · ACS 2020-2024: 6,768 ±21
Median household income
$62,378
±$13,165 (90% margin)
Ohio: $71,389
Median home value
$176,000
±$19,383 (90% margin)
Ohio: $214,800
Median gross rent
$1,085
±$61 (90% margin)
Ohio: $1,034
Where is St. Clair Township, Butler County and what county is it in?
St. Clair Township, Butler County is a township in Butler County, Ohio. It covers 21.0 square miles of land, 317 residents per square mile in 2020.
3 places lie inside St. Clair Township (Butler County): New Miami (village, 2,217 in 2020), Williamsdale (CDP, 578 in 2020) and Woodsdale (CDP, 442 in 2020). Part of Seven Mile (village) also lies in it.
St. Clair Township, Butler County is in the Cincinnati, OH-KY-IN metropolitan statistical area, which takes in 15 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in St. Clair Township, Butler County, and is it growing?
The Census Bureau estimates that 6,940 people lived in St. Clair Township, Butler County on July 1, 2025, up 3.5% since 2020, faster than Ohio (+0.9%). The 2020 Census counted 6,671 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 6,768 (±21).
| Measure | St. Clair Township, Butler County | Butler County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 6,768±21 | 392,876 | −448 |
| Households | 2,407±166 | 146,822 | no clear change |
| Average household size | 2.81±0.19 | 2.60 | no clear change |
| Housing units | 2,562±173 | 155,372 | −398 |
St. Clair Township, Butler County's population since 2000
From 7,336 in 2000 to 6,940 in 2025: down 5.4%. The 2000, 2010 and 2020 figures are census counts, each for St. Clair Township, Butler County as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in St. Clair Township, Butler County?
The median resident of St. Clair Township, Butler County is 39.8 years old; 22.9% are under 18 and 16.2% are 65 or older. The largest group is non-Hispanic white residents at 90.4%, then non-Hispanic residents of two or more races at 5.8%.
| Measure | St. Clair Township, Butler County | Butler County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 39.8±2.9 | 37.2 | no clear change |
| Under 18 years | 22.9%±4.6 pts | 23.4% | – |
| 65 years and over | 16.2%±3.4 pts | 15.9% | – |
| Male | 49.2%±3.3 pts | 49.4% | – |
| Hispanic or Latino (any race) | 2.1%±1.9 pts | 7.0% | – |
| White alone, not Hispanic | 90.4%±3.3 pts | 74.6% | −5.6 pts |
| Black or African American alone, not Hispanic | 1.7%±1.2 pts | 8.3% | – |
| Asian alone, not Hispanic | 0.0%±0.1 pts | 4.3% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±0.1 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.6 pts | 0.1% | – |
| Two or more races, not Hispanic | 5.8%±2.6 pts | 5.3% | – |
| Some other race alone, not Hispanic | 0.0%±0.6 pts | 0.5% | – |
| Born outside the United States | 0.5%±0.5 pts | 8.0% | – |
| Speak a language other than English at home (age 5+) | 0.7%±0.5 pts | 10.7% | – |
| Civilian veterans (age 18+) | 7.6%±2.6 pts | 5.9% | – |
| With a disability | 22.0%±4.9 pts | 12.5% | – |
| No health insurance coverage | 10.3%±5.0 pts | 6.2% | no clear change |
| High school graduate or higher (age 25+) | 82.2%±3.6 pts | 91.2% | – |
| Bachelor's degree or higher (age 25+) | 10.9%±3.5 pts | 32.8% | no clear change |
| Graduate or professional degree (age 25+) | 3.6%±2.6 pts | 11.7% | – |
| Lived in the same house a year earlier | 93.2%±2.4 pts | 87.1% | – |
| Moved from another state in the past year | 0.5%±0.5 pts | 1.9% | – |
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 St. Clair Township, Butler County earn?
Half of St. Clair Township, Butler County's 2,407 households earn less than $62,378 a year (±$13,165), against $81,590 in Butler County and $71,389 in Ohio. In 2015-2019 it was $68,308 in 2024 dollars; the margins of error cannot tell the two periods apart. 16.7% of residents live below the poverty line.
| Measure | St. Clair Township, Butler County | Butler County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $62,378±$13,165 | $81,590 | no clear change |
| Mean household income | $84,971±$10,680 | $104,738 | – |
| Per capita income | $31,274±$3,567 | $40,027 | no clear change |
| People below the poverty line | 16.7%±4.7 pts | 11.8% | +7.1 pts |
| Children under 18 below the poverty line | 18.0%±10.6 pts | 13.1% | – |
| Households receiving SNAP | 18.0%±4.9 pts | 9.8% | – |
| Households with a computer | 95.4%±2.2 pts | 95.5% | – |
| Households with a broadband subscription | 90.8%±3.4 pts | 92.2% | – |
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 St. Clair Township, Butler County?
Owners occupy 77.3% of St. Clair Township, Butler County's occupied homes and renters 22.7%. The median owner-occupied home is valued at $176,000 by its owner (±$19,383). The median renter pays $1,085 a month including utilities, and 42.6% of renters pay 35% or more of their income on rent.
| Measure | St. Clair Township, Butler County | Butler County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $176,000±$19,383 | $258,500 | +$51,700 |
| Median gross rent | $1,085±$61 | $1,135 | no clear change |
| Renters paying 35% or more of income on rent | 42.6%±16.2 pts | 40.3% | no clear change |
| Median monthly owner costs, with a mortgage | $1,194±$97 | $1,665 | – |
| Owner-occupied homes | 77.3%±5.3 pts | 69.9% | no clear change |
| Renter-occupied homes | 22.7%±5.3 pts | 30.1% | – |
| Housing units | 2,562±173 | 155,372 | −398 |
| Homeowner vacancy rate | 0.6%±0.9 pts | 0.8% | – |
| Rental vacancy rate | 0.0%±6.6 pts | 4.5% | – |
| Single-family detached homes | 90.6%±3.1 pts | 72.4% | – |
| Mobile homes | 6.0%±2.2 pts | 2.3% | – |
| Built 2020 or later | 1.2%±1.2 pts | 0.9% | – |
| Built 2010 to 2019 | 0.5%±0.8 pts | 7.1% | – |
| Built 1939 or earlier | 16.9%±4.5 pts | 10.7% | – |
| Households with no vehicle | 2.6%±1.5 pts | 4.7% | – |
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 St. Clair Township, Butler County work and get to work?
78.8% of St. Clair Township, Butler County's workers drive alone. The average trip to work takes 26.6 minutes. The unemployment rate in 2020-2024 averaged 6.6%.
| Measure | St. Clair Township, Butler County | Butler County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 55.8%±7.2 pts | 63.9% | – |
| Unemployment rate | 6.6%±3.3 pts | 5.1% | no clear change |
| Drove alone to work | 78.8%±7.7 pts | 75.1% | – |
| Carpooled | 7.5%±3.8 pts | 8.1% | – |
| Public transportation | 0.1%±0.1 pts | 0.3% | – |
| Walked | 0.9%±0.7 pts | 1.7% | – |
| Worked from home | 12.1%±8.0 pts | 13.3% | – |
| Mean travel time to work | 26.6 min±3.8 | 24.3 min | no clear change |
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 census tracts are in St. Clair Township, Butler County?
2 census tracts lie mostly in St. Clair Township, Butler County, and 5 more reach into it (2020 census blocks). Their median household incomes run from $44,271 (Tract 105) to $75,813 (Tract 106).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 106Butler County | 3,355 | $75,813 |
| Tract 105Butler County | 2,333 | $44,271 |
| Tract 149Butler County | 5,707 | $99,350 |
| Tract 10.01Butler County | 5,462 | $64,279 |
| Tract 151Butler County | 7,431 | $77,712 |
| Tract 13Butler County | 4,368 | $83,281 |
| Tract 10.02Butler County | 5,125 | $56,266 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in St. Clair Township, Butler County) · Census block assignment files
How does St. Clair Township, Butler County compare with other places in Ohio?
By the Census Bureau's July 2025 estimates, St. Clair Township, Butler County is the 1,737th-most populous of the 16,079 U.S. towns and townships that have one and the 185th-most populous of 1,311 in Ohio.
St. Clair Township, Butler County ranks 1,201st of 1,699 places in Ohio with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 185th | 1,311 |
| Growth 2020-2025 (PEP) | 215th | 1,589 |
| Residents per square mile | 806th | 1,734 |
| Median household income | 1,201st | 1,699 |
| Per capita income | 1,273rd | 1,729 |
| Median home value | 1,019th | 1,707 |
| Median gross rent | 354th | 1,453 |
| Poverty rate | 276th | 1,116 |
| Bachelor's degree or higher | 1,492nd | 1,613 |
| Median age | 1,120th | 1,727 |
| Owner-occupied share | 988th | 1,732 |
| Travel time to work | 613th | 1,731 |
St. Clair Township, Butler County's figures with every place in Ohio (CSV)
Every place in Ohio, sortable · Compare St. Clair Township, Butler County with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for St. Clair Township, Butler County?
17 of the 57 figures for St. Clair Township, Butler County on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. 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 · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for St. Clair Township, Butler County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.