City · Missouri
Marthasville, Missouri
Marthasville, city, in Warren County, Missouri. Marthasville had 1,302 residents on July 1, 2025 by the Census Bureau's estimate, up 3.0% since 2020; the 2020 Census counted 1,245 and the ACS 2020-2024 5-year estimates put it at 2,328 (±851). GEOID 2946424.
Residents, July 2025 estimate
1,302
Census Bureau estimate (no margin published)
2020 Census count: 1,245 · ACS 2020-2024: 2,328 ±851
Median household income
$112,083
±$20,321 (90% margin)
Missouri: $70,702
Median home value
$182,900
±$38,875 (90% margin)
Missouri: $230,300
Median gross rent
$953
±$314 (90% margin)
Missouri: $1,033
Where is Marthasville and what county is it in?
Marthasville is a city in Warren County, Missouri. It covers 0.9 square miles of land, 1,458 residents per square mile in 2020.
Marthasville is in the St. Louis, MO-IL 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 Marthasville, and is it growing?
The Census Bureau estimates that 1,302 people lived in Marthasville on July 1, 2025, up 3.0% since 2020, faster than Missouri (+1.9%). The 2020 Census counted 1,245 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 2,328 (±851).
| Measure | Marthasville | Warren County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 2,328 ±851 | 37,177 | +971 |
| Households | 686 ±181 | 13,845 | +233 |
| Average household size | 3.34 ±0.64 | 2.67 | no clear change |
| Housing units | 721 ±179 | 16,161 | +214 |
Marthasville's population since 2000
From 837 in 2000 to 1,302 in 2025: up 55.6%. The 2000, 2010 and 2020 figures are census counts, each for Marthasville 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 Marthasville?
The median resident of Marthasville is 30.5 years old; 33.8% are under 18 and 8.1% are 65 or older. The largest group is non-Hispanic white residents at 94.8%, then non-Hispanic residents of two or more races at 2.7%.
| Measure | Marthasville | Warren County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 30.5 ±5.6 | 40.8 | no clear change |
| Under 18 years | 33.8% ±8.5 pts | 23.1% | – |
| 65 years and over | 8.1% ±4.3 pts | 18.2% | – |
| Male | 53.3% ±4.8 pts | 49.9% | – |
| Hispanic or Latino (any race) | 2.4% ±2.2 pts | 4.1% | – |
| White alone, not Hispanic | 94.8% ±4.5 pts | 89.4% | no clear change |
| Black or African American alone, not Hispanic | 0.0% ±1.5 pts | 1.1% | – |
| Asian alone, not Hispanic | 0.0% ±1.5 pts | 0.4% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.5 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.5 pts | 0.0% | – |
| Two or more races, not Hispanic | 2.7% ±3.4 pts | 4.7% | – |
| Some other race alone, not Hispanic | 0.0% ±1.5 pts | 0.1% | – |
| Born outside the United States | 0.3% ±0.5 pts | 1.0% | – |
| Speak a language other than English at home (age 5+) | 4.5% ±2.9 pts | 2.8% | – |
| Civilian veterans (age 18+) | 5.0% ±3.0 pts | 9.2% | – |
| With a disability | 9.0% ±5.7 pts | 14.5% | – |
| No health insurance coverage | 2.9% ±2.7 pts | 7.4% | – |
| High school graduate or higher (age 25+) | 96.7% ±2.1 pts | 90.5% | – |
| Bachelor's degree or higher (age 25+) | 20.1% ±8.1 pts | 20.2% | no clear change |
| Graduate or professional degree (age 25+) | 8.1% ±4.8 pts | 5.7% | – |
| Lived in the same house a year earlier | 96.2% ±3.5 pts | 89.5% | – |
| Moved from another state in the past year | 0.0% ±1.5 pts | 2.9% | – |
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 Marthasville earn?
Half of Marthasville's 686 households earn less than $112,083 a year (±$20,321), against $81,209 in Warren County and $70,702 in Missouri. In 2015-2019 the median was $87,201 in 2024 dollars, so it rose by $24,882 after inflation.
| Measure | Marthasville | Warren County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $112,083 ±$20,321 | $81,209 | +$24,882 |
| Mean household income | $113,837 ±$14,290 | $99,746 | – |
| Per capita income | $33,659 ±$4,636 | $37,271 | no clear change |
| People below the poverty line | 2.6% ±3.2 pts | 8.0% | – |
| Children under 18 below the poverty line | 0.0% ±4.5 pts | 9.1% | – |
| Households receiving SNAP | 6.0% ±4.7 pts | 6.9% | – |
| Households with a computer | 98.0% ±1.8 pts | 95.1% | – |
| Households with a broadband subscription | 92.4% ±4.7 pts | 91.8% | – |
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 Marthasville?
Owners occupy 82.8% of Marthasville's occupied homes and renters 17.2%. The median owner-occupied home is valued at $182,900 by its owner (±$38,875). The median renter pays $953 a month including utilities.
| Measure | Marthasville | Warren County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $182,900 ±$38,875 | $260,400 | no clear change |
| Median gross rent | $953 ±$314 | $995 | no clear change |
| Renters paying 35% or more of income on rent | 27.6% ±18.8 pts | 31.2% | – |
| Median monthly owner costs, with a mortgage | $1,082 ±$219 | $1,485 | – |
| Owner-occupied homes | 82.8% ±8.6 pts | 80.2% | no clear change |
| Renter-occupied homes | 17.2% ±8.6 pts | 19.8% | – |
| Housing units | 721 ±179 | 16,161 | +214 |
| Homeowner vacancy rate | 0.0% ±6.0 pts | 0.7% | – |
| Rental vacancy rate | 10.6% ±16.7 pts | 5.2% | – |
| Single-family detached homes | 84.7% ±6.5 pts | 79.0% | – |
| Mobile homes | 0.0% ±4.7 pts | 10.0% | – |
| Built 2020 or later | 0.6% ±1.0 pts | 5.6% | – |
| Built 2010 to 2019 | 9.6% ±5.5 pts | 15.7% | – |
| Built 1939 or earlier | 8.9% ±5.9 pts | 4.9% | – |
| Households with no vehicle | 2.9% ±2.7 pts | 3.1% | – |
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 Marthasville work and get to work?
84.1% of Marthasville's workers drive alone. The average trip to work takes 37.7 minutes.
| Measure | Marthasville | Warren County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 82.7% ±7.3 pts | 62.8% | – |
| Unemployment rate | 1.1% ±1.5 pts | 3.7% | – |
| Drove alone to work | 84.1% ±7.7 pts | 80.5% | – |
| Carpooled | 5.3% ±3.8 pts | 9.5% | – |
| Public transportation | 0.4% ±0.7 pts | 0.2% | – |
| Walked | 0.0% ±2.7 pts | 0.4% | – |
| Worked from home | 10.2% ±8.1 pts | 9.0% | – |
| Mean travel time to work | 37.7 min ±9.3 | 31.6 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 Marthasville?
No census tract lies mostly in Marthasville; 2 tracts reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 8202.04Warren County | 4,503 | $101,111 |
| Tract 8202.03Warren County | 4,030 | $88,218 |
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 Marthasville) · Census block assignment files
How does Marthasville compare with other places in Missouri?
By the Census Bureau's July 2025 estimates, Marthasville is the 9,310th-most populous of the 19,476 U.S. incorporated places that have one and the 302nd-most populous of 936 in Missouri.
Marthasville ranks 32nd of 416 places in Missouri with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 302nd | 936 |
| Growth 2020-2025 (PEP) | 142nd | 394 |
| Residents per square mile | 117th | 420 |
| Median household income | 32nd | 416 |
| Per capita income | 142nd | 420 |
| Median home value | 163rd | 416 |
| Median gross rent | 160th | 398 |
| Bachelor's degree or higher | 207th | 404 |
| Median age | 395th | 420 |
| Owner-occupied share | 56th | 418 |
| Travel time to work | 8th | 420 |
Marthasville's figures with every place in Missouri (CSV)
Every place in Missouri, sortable · Compare Marthasville 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 Marthasville?
25 of the 57 figures for Marthasville 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 Marthasville 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 Marthasville.