County · Missouri
Franklin County, Missouri
Franklin County, Missouri. Franklin County had 108,090 residents in 2025 by the Census Bureau's estimate, up 3.3% since 2020, faster than Missouri (+1.9%). It holds 17 places (13 cities, villages and boroughs and 4 census-designated) and 28 census tracts. GEOID 29071.
Franklin County is one of the 15 counties of the St. Louis, MO-IL metropolitan statistical area (the Census Bureau's July 2023 delineation).
Residents, July 2025 estimate
108,090
Census Bureau estimate (no margin published)
2020 Census count: 104,682 · ACS 2020-2024: 105,950
Median household income
$73,165
±$2,639 (90% margin)
Missouri: $70,702
Median home value
$227,600
±$5,671 (90% margin)
Missouri: $230,300
Median gross rent
$893
±$26 (90% margin)
Missouri: $1,033
How many people live in Franklin County, and is it growing?
The 2020 Census counted 104,682 residents in Franklin County. The Census Bureau estimates 108,090 for July 1, 2025, up 3.3% since 2020, faster than Missouri (+1.9%). The 2020-2024 American Community Survey puts the population at 105,950 over 923 square miles of land.
| Measure | Franklin County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| Total population | 105,950 | 6,191,814 | +2,759 |
| Households | 43,036±493 | 2,508,227 | +2,093 |
| Average household size | 2.44±0.03 | 2.40 | −0.06 |
| Housing units | 46,312±99 | 2,825,287 | +1,176 |
Franklin County's population since 2000
From 93,807 in 2000 to 108,090 in 2025: up 15.2%. The 2000, 2010 and 2020 figures are census counts. 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); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Franklin County?
Franklin County holds 17 places: 13 cities, villages and boroughs (incorporated places) and 4 census-designated places. The largest is Washington with 15,906 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Washington | 14,500 | $79,173 |
|---|---|---|
| Union | 12,348 | $73,435 |
| Pacific | 7,414 | $62,860 |
| Sullivan | 6,906 | $63,370 |
| St. Clair | 4,791 | $41,820 |
| Gray Summit | 3,055 | $65,667 |
| Villa Ridge | 2,601 | $73,826 |
| New Haven | 2,414 | $71,306 |
| Gerald | 1,361 | $61,458 |
| Lake St. ClairGEOID 2940039 | 825 | $81,397 |
| Parkway | 663 | $44,479 |
| Oak Grove VillageGEOID 2953650 | 412 | $41,324 |
| StantonGEOID 2970342 | 366 | not published |
| Berger | 256 | $55,938 |
| LeslieGEOID 2941690 | 136 | not published |
| Miramiguoa ParkGEOID 2948880 | 126 | $80,000 |
| CharmwoodGEOID 2913390 | 17 | not published |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Franklin County?
The median resident of Franklin County is 41.8 years old; 22.4% are under 18 and 19.2% are 65 or older. The largest group is non-Hispanic white residents at 88.7%, then non-Hispanic residents of two or more races at 7.4%. 1.4% of residents were born outside the United States.
| Measure | Franklin County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| Median age | 41.8±0.5 | 39.0 | +1.1 |
| Under 18 years | 22.4% | 22.3% | – |
| 65 years and over | 19.2%±0.1 pts | 17.9% | – |
| Hispanic or Latino (any race) | 2.3% | 5.2% | +0.6 pts |
| White alone, not Hispanic | 88.7%±1.1 pts | 76.3% | −6.3 pts |
| Black or African American alone, not Hispanic | 0.9%±0.2 pts | 10.9% | no clear change |
| Asian alone, not Hispanic | 0.4%±0.1 pts | 2.1% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.1%±0.1 pts | 0.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.1 pts | 0.1% | – |
| Two or more races, not Hispanic | 7.4%±1.1 pts | 4.8% | – |
| Some other race alone, not Hispanic | 0.2%±0.1 pts | 0.4% | – |
| Born outside the United States | 1.4%±0.4 pts | 4.5% | no clear change |
| Speak a language other than English at home (age 5+) | 1.9%±0.3 pts | 6.7% | – |
| Civilian veterans (age 18+) | 7.7%±0.7 pts | 7.3% | – |
| With a disability | 14.4%±0.8 pts | 14.9% | – |
| No health insurance coverage | 6.9%±0.9 pts | 8.8% | no clear change |
| High school graduate or higher (age 25+) | 90.8%±0.9 pts | 91.9% | – |
| Bachelor's degree or higher (age 25+) | 23.7%±1.5 pts | 32.4% | +2.8 pts |
| Graduate or professional degree (age 25+) | 7.9%±0.8 pts | 12.6% | – |
| Moved from another state in the past year | 1.5%±0.5 pts | 2.5% | – |
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 Franklin County earn?
Half of Franklin County's 43,036 households earn less than $73,165 a year (±$2,639), against $70,702 in Missouri. In 2015-2019 it was $70,413 in 2024 dollars; the margins of error cannot tell the two periods apart. 8.2% of residents live below the poverty line.
| Measure | Franklin County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $73,165±$2,639 | $70,702 | no clear change |
| Mean household income | $92,432±$3,015 | $96,247 | – |
| Per capita income | $37,792±$1,199 | $39,695 | no clear change |
| People below the poverty line | 8.2%±0.9 pts | 12.6% | −2.3 pts |
| Children under 18 below the poverty line | 8.4%±1.6 pts | 15.8% | −8.6 pts |
| Households receiving SNAP | 7.1%±0.9 pts | 9.8% | – |
| Households with a broadband subscription | 90.0%±1.1 pts | 89.3% | – |
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 Franklin County?
Owners occupy 76.5% of Franklin County's occupied homes and renters 23.5%. The median owner-occupied home is valued at $227,600 by its owner (±$5,671). The median renter pays $893 a month including utilities, and 31.6% of renters pay 35% or more of their income on rent.
| Measure | Franklin County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $227,600±$5,671 | $230,300 | +$23,674 |
| Median gross rent | $893±$26 | $1,033 | no clear change |
| Renters paying 35% or more of income on rent | 31.6%±3.8 pts | 36.6% | no clear change |
| Median monthly owner costs, with a mortgage | $1,442±$32 | $1,524 | – |
| Owner-occupied homes | 76.5%±1.6 pts | 68.1% | no clear change |
| Housing units | 46,312±99 | 2,825,287 | +1,176 |
| Homeowner vacancy rate | 0.7%±0.4 pts | 0.9% | – |
| Rental vacancy rate | 6.4%±2.2 pts | 5.0% | – |
| Single-family detached homes | 75.8%±1.7 pts | 70.5% | – |
| Mobile homes | 9.0%±1.1 pts | 5.2% | – |
| Built 2020 or later | 1.5%±0.4 pts | 1.6% | – |
| Built 1939 or earlier | 9.9%±1.2 pts | 13.3% | – |
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 Franklin County building?
Builders took permits for 794 new housing units across Franklin County in 2025 (458 single-family), 7.3 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Franklin County get to work?
78.0% of Franklin County's workers drive alone and 10.3% work from home. The average trip to work takes 28.3 minutes. The unemployment rate in 2020-2024 averaged 4.3%.
| Measure | Franklin County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 62.3%±1.0 pts | 63.1% | – |
| Unemployment rate | 4.3%±0.8 pts | 4.0% | no clear change |
| Drove alone to work | 78.0%±1.6 pts | 74.8% | – |
| Carpooled | 9.6%±1.5 pts | 8.1% | – |
| Public transportation | 0.2%±0.1 pts | 0.8% | – |
| Walked | 1.3%±0.4 pts | 1.8% | – |
| Worked from home | 10.3%±1.2 pts | 13.0% | +6.3 pts |
| Mean travel time to work | 28.3 min±1.0 | 23.5 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 are Franklin County's census tracts?
Franklin County is divided into 28 census tracts. Among those with a reliable estimate, median household income runs from $41,419 (Tract 8009.03) to $112,369 (Tract 8003.01).
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Franklin County compare with Missouri's other counties?
| Measure | Rank |
|---|---|
| Population | 12th of 115 |
| Growth 2020-2025 | 35th of 115 |
| Residents per square mile | 17th of 115 |
| Median household income | 16th of 115 |
| Median home value | 17th of 115 |
| Median gross rent | 24th of 115 |
| Poverty rate | 107th of 115 |
| Bachelor's degree or higher | 31st of 115 |
| Median age | 49th of 115 |
Source: PlainCities ranks 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 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 Franklin 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.