City · Ohio
Fairfield, Ohio
Fairfield, city, in Butler County, Ohio. Fairfield had 44,682 residents on July 1, 2025 by the Census Bureau's estimate, down 0.5% since 2020; the 2020 Census counted 44,907 and the ACS 2020-2024 5-year estimates put it at 44,828 (±35). GEOID 3925970.
Residents, July 2025 estimate
44,682
Census Bureau estimate (no margin published)
2020 Census count: 44,907 · ACS 2020-2024: 44,828 ±35
Median household income
$77,937
±$5,996 (90% margin)
Ohio: $71,389
Median home value
$234,500
±$7,711 (90% margin)
Ohio: $214,800
Median gross rent
$1,242
±$51 (90% margin)
Ohio: $1,034
Where is Fairfield and what county is it in?
Fairfield is a city in Butler County, Ohio. It covers 20.8 square miles of land, 2,156 residents per square mile in 2020.
Fairfield is in the Cincinnati, OH-KY-IN metropolitan statistical area, which takes in 15 counties (Census Bureau delineation, July 2023).
| County | 2020 residents | Share |
|---|---|---|
| Butler County | 44,907 | 100.0% |
| Hamilton County | land only, no residents | – |
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Fairfield, and is it growing?
The Census Bureau estimates that 44,682 people lived in Fairfield on July 1, 2025, down 0.5% since 2020, while Ohio grew 0.9%. The 2020 Census counted 44,907 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 44,828 (±35).
| Measure | Fairfield | Butler County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 44,828 ±35 | 392,876 | +2,194 |
| Households | 18,428 ±671 | 146,822 | +1,482 |
| Average household size | 2.41 ±0.09 | 2.60 | no clear change |
| Housing units | 19,548 ±685 | 155,372 | +1,201 |
Fairfield's population since 2000
From 42,097 in 2000 to 44,682 in 2025: up 6.1%. The 2000, 2010 and 2020 figures are census counts, each for Fairfield 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 Fairfield?
The median resident of Fairfield is 38.1 years old; 21.0% are under 18 and 17.6% are 65 or older. The largest group is non-Hispanic white residents at 59.3%, then non-Hispanic Black residents at 14.9%. 12.0% of residents were born outside the United States.
| Measure | Fairfield | Butler County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 38.1 ±1.7 | 37.2 | no clear change |
| Under 18 years | 21.0% ±1.5 pts | 23.4% | – |
| 65 years and over | 17.6% ±1.2 pts | 15.9% | – |
| Male | 49.6% ±1.7 pts | 49.4% | – |
| Hispanic or Latino (any race) | 11.4% ±2.4 pts | 7.0% | +3.3 pts |
| White alone, not Hispanic | 59.3% ±3.4 pts | 74.6% | −11.1 pts |
| Black or African American alone, not Hispanic | 14.9% ±2.1 pts | 8.3% | no clear change |
| Asian alone, not Hispanic | 7.4% ±2.1 pts | 4.3% | +4.1 pts |
| 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% ±0.1 pts | 0.1% | – |
| Two or more races, not Hispanic | 5.8% ±1.3 pts | 5.3% | – |
| Some other race alone, not Hispanic | 1.2% ±1.1 pts | 0.5% | – |
| Born outside the United States | 12.0% ±2.1 pts | 8.0% | no clear change |
| Speak a language other than English at home (age 5+) | 17.9% ±3.1 pts | 10.7% | – |
| Civilian veterans (age 18+) | 5.3% ±0.8 pts | 5.9% | – |
| With a disability | 11.9% ±1.6 pts | 12.5% | – |
| No health insurance coverage | 8.3% ±2.2 pts | 6.2% | no clear change |
| High school graduate or higher (age 25+) | 90.8% ±1.6 pts | 91.2% | – |
| Bachelor's degree or higher (age 25+) | 30.7% ±2.3 pts | 32.8% | no clear change |
| Graduate or professional degree (age 25+) | 8.4% ±1.3 pts | 11.7% | – |
| Lived in the same house a year earlier | 90.7% ±1.5 pts | 87.1% | – |
| Moved from another state in the past year | 1.3% ±0.8 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 Fairfield earn?
Half of Fairfield's 18,428 households earn less than $77,937 a year (±$5,996), against $81,590 in Butler County and $71,389 in Ohio. In 2015-2019 it was $74,260 in 2024 dollars; the margins of error cannot tell the two periods apart. 8.4% of residents live below the poverty line.
| Measure | Fairfield | Butler County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $77,937 ±$5,996 | $81,590 | no clear change |
| Mean household income | $97,330 ±$5,620 | $104,738 | – |
| Per capita income | $40,668 ±$2,513 | $40,027 | no clear change |
| People below the poverty line | 8.4% ±1.9 pts | 11.8% | no clear change |
| Children under 18 below the poverty line | 10.5% ±4.2 pts | 13.1% | no clear change |
| Households receiving SNAP | 8.3% ±1.8 pts | 9.8% | – |
| Households with a computer | 95.9% ±1.3 pts | 95.5% | – |
| Households with a broadband subscription | 93.4% ±1.6 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 Fairfield?
Owners occupy 63.2% of Fairfield's occupied homes and renters 36.8%. The median owner-occupied home is valued at $234,500 by its owner (±$7,711). The median renter pays $1,242 a month including utilities, and 41.6% of renters pay 35% or more of their income on rent.
| Measure | Fairfield | Butler County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $234,500 ±$7,711 | $258,500 | +$38,450 |
| Median gross rent | $1,242 ±$51 | $1,135 | +$80 |
| Renters paying 35% or more of income on rent | 41.6% ±5.8 pts | 40.3% | +10.7 pts |
| Median monthly owner costs, with a mortgage | $1,523 ±$55 | $1,665 | – |
| Owner-occupied homes | 63.2% ±3.3 pts | 69.9% | no clear change |
| Renter-occupied homes | 36.8% ±3.3 pts | 30.1% | – |
| Housing units | 19,548 ±685 | 155,372 | +1,201 |
| Homeowner vacancy rate | 0.4% ±0.4 pts | 0.8% | – |
| Rental vacancy rate | 8.4% ±3.0 pts | 4.5% | – |
| Single-family detached homes | 56.0% ±2.8 pts | 72.4% | – |
| Mobile homes | 2.1% ±0.9 pts | 2.3% | – |
| Built 2020 or later | 0.3% ±0.3 pts | 0.9% | – |
| Built 2010 to 2019 | 4.5% ±1.7 pts | 7.1% | – |
| Built 1939 or earlier | 1.7% ±0.8 pts | 10.7% | – |
| Households with no vehicle | 3.4% ±1.2 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 many new homes is Fairfield building?
Builders took permits for 22 new housing units in Fairfield in 2025 (22 in single-family houses), 0.5 per 1,000 residents against 2.8 across Ohio.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Fairfield work and get to work?
75.5% of Fairfield's workers drive alone and 10.5% work from home. The average trip to work takes 23.8 minutes. The unemployment rate in 2020-2024 averaged 5.5%.
| Measure | Fairfield | Butler County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 67.3% ±2.2 pts | 63.9% | – |
| Unemployment rate | 5.5% ±1.9 pts | 5.1% | +2.5 pts |
| Drove alone to work | 75.5% ±2.8 pts | 75.1% | – |
| Carpooled | 11.5% ±2.0 pts | 8.1% | – |
| Public transportation | 0.1% ±0.1 pts | 0.3% | – |
| Walked | 0.6% ±0.5 pts | 1.7% | – |
| Worked from home | 10.5% ±1.6 pts | 13.3% | +8.4 pts |
| Mean travel time to work | 23.8 min ±2.0 | 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 Fairfield?
10 census tracts lie mostly in Fairfield, and 4 more reach into it (2020 census blocks). Their median household incomes run from $61,409 (Tract 109.09) to $102,449 (Tract 109.12).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 109.06Butler County | 7,853 | $67,109 |
| Tract 109.03Butler County | 6,061 | $86,865 |
| Tract 109.09Butler County | 5,170 | $61,409 |
| Tract 109.01Butler County | 4,567 | $73,082 |
| Tract 109.10Butler County | 4,404 | $90,909 |
| Tract 109.04Butler County | 3,722 | $81,250 |
| Tract 109.13Butler County | 3,236 | $65,761 |
| Tract 109.11Butler County | 3,882 | $88,785 |
| Tract 109.07Butler County | 2,817 | $72,750 |
| Tract 109.12Butler County | 2,680 | $102,449 |
| Tract 110.03Butler County | 7,325 | $116,615 |
| Tract 111.23Butler County | 4,980 | $58,472 |
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 Fairfield) · Census block assignment files
How does Fairfield compare with other places in Ohio?
By the Census Bureau's July 2025 estimates, Fairfield is the 930th-most populous of the 19,476 U.S. incorporated places that have one and the 27th-most populous of 923 in Ohio.
Fairfield ranks 713th 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 | 27th | 923 |
| Growth 2020-2025 (PEP) | 917th | 1,589 |
| Residents per square mile | 192nd | 1,734 |
| Median household income | 713th | 1,699 |
| Per capita income | 580th | 1,729 |
| Median home value | 540th | 1,707 |
| Median gross rent | 203rd | 1,453 |
| Poverty rate | 735th | 1,116 |
| Bachelor's degree or higher | 439th | 1,613 |
| Median age | 1,294th | 1,727 |
| Owner-occupied share | 1,472nd | 1,732 |
| Work from home | 539th | 990 |
| Travel time to work | 938th | 1,731 |
Fairfield's figures with every place in Ohio (CSV)
Every place in Ohio, sortable · Compare Fairfield 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 Fairfield?
7 of the 57 figures for Fairfield 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 Fairfield 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' public schools in Fairfield.