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Warren County, MO
8 cities and towns and 5 ZIP codes in Warren County, Missouri.
Population
37,177
Land area
429sq mi
People per sq mi
87
ZIP codes
5
Cities and towns in Warren County
Warren County at a glance
- Households here earn a median of $81,209 a year, 15% more than the Missouri figure of $70,702.
- A typical owner-occupied home is valued at $260,400 (13% above Missouri) and median rent is $995 a month.
- The biggest population centers are Warrenton (9,066), Wright City (5,240) and Marthasville (2,328).
Local data for Warren County, MO
Counts from official public data
Housing and community stats
Warren County, MO, American Community Survey 2020-2024
Median household income
$81,209
Poverty rate
8.0%
Median home value
$260,400
Prices +5.6% in a year
Median rent
$995/mo
Homeownership
80.2%
Bachelor's or higher
20.2%
Median age
40.8
Average commute
31.6 min
Largest reported origins and ancestries: German Americans (12,329), Irish Americans (4,512), Italian Americans (1,642).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
3.7%
Aug 2026, -0.2 pts in a year
Average annual pay
$53,114
9,000 jobs, 2025
Income per person
$56,344
BEA, 2024
Federal spending
$238M
FY 2026, $6,687 per person
PPP loans
$42.33M
777 loans, 4,916 jobs reported
Campaign donations
$80.61K
Itemized, 2026 cycle
How people get to work
Warren County, MO, workers 16 and older. American Community Survey 5-year estimates
- Drove alone80.5%
- Carpooled9.5%
- Public transit0.2%
- Walked0.4%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.5%
- Worked from home9.0%
Average one-way commute: 31.6 minutes for people who do not work from home.
Environment and hazard risk
Warren County, MO, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: heat wave
Storm events since 1996
363
Most often thunderstorm wind
Flood insurance policies
42
0.2% of homes, county
July high / Jan low
88° / 20°F
41.5 inches of rain a year
Hazards, floods and storm historyCheck a flood zone7 historic places
Health statistics
Share of adults in Warren County, MO, CDC PLACES estimates
Obesity
39.0%
U.S. 33.3% +5.7 pts
Diabetes
12.3%
U.S. 12.1% about the same
Smoking
17.1%
U.S. 12.8% +4.3 pts
Uninsured (18-64)
8.9%
U.S. 11.1% -2.2 pts
Cities, towns and ZIP codes in Warren County
Population shown
Frequently asked questions
- What is the largest city in Warren County, MO?
- Warrenton is the largest city or town in Warren County, with about 9,066 residents.
- How many ZIP codes are in Warren County?
- Warren County includes 5 ZIP Code Tabulation Areas, including 63357, 63380, 63381, 63383, 63390.
- What is the population of Warren County, MO?
- About 37,177 people live in Warren County, based on American Community Survey 5-year estimates.
- What counties border Warren County?
- Warren County borders St. Charles County, Franklin County, Lincoln County, Gasconade County, Montgomery County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023