• county
  • FIPS 29219
  • Largest town: Warrenton

Warren County, Missouri

Warren County had 38,478 residents in the Census Vintage 2024 estimate, on 428.6 square miles of land. It ranks 31st of 115 in Missouri by population and 101st by land area.

Population
38,478
#31 of 115 in Missouri · #1,221 in US
Area
428.6 sq mi
#101 of 115 in Missouri · #2,372 in US
Density
90 / sq mi
#22 of 115 in Missouri · #993 in US
Median household income
$77,075
#9 of 115 in Missouri · #577 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Warren County within Missouri. Pin: Jefferson City.

Measure from here

Tools and pages that start from Warren County

Warren County population, land area and income

Warren County had 38,478 residents in the Census Vintage 2024 estimate, on 428.6 square miles of land. It ranks 31st of 115 in Missouri by population and 101st by land area. That works out to 89.8 people per square mile, near the US average of 96.3, and above the national county median.

The median county-equivalent in Missouri has 19,100 residents, so Warren County is 2.0 times that size.

Its SAIPE 2023 median household income of $77,075 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

38,478

3144th1st

1221st of 3,144 (US)

Land area

429 sq mi

3144th1st

2372nd of 3,144 (US)

Density

89.8 / sq mi

3144th1st

993rd of 3,144 (US)

Median household income

$77,075

3143rd1st

577th of 3,143 (US)

Rank within Missouri (115)

Population

38,478

115th1st

31st of 115 (MO)

Land area

429 sq mi

115th1st

101st of 115 (MO)

Density

89.8 / sq mi

115th1st

22nd of 115 (MO)

Median household income

$77,075

115th1st

9th of 115 (MO)

How Warren County's population changed since 2020

Warren County gained 2,738 residents between the July 2020 and July 2024 estimates, a rise of 7.7%. That ranks 3rd of 115 in Missouri for growth. The median Missouri county changed by +1.4%, and the state as a whole by +1.5%.

Since the April 2020 estimates base, Warren County recorded 1,822 births and 1,788 deaths, a natural change of +34. Net international migration added +2 and net domestic migration, people moving to or from other US counties, came to +2,912. The largest single component was domestic migration, which added 2,912 people.

35.7k202036.6k202137.3k202237.8k202338.5k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
1,822
Deaths
1,788
Net international migration
+2
Net domestic migration
+2,912
Change, July 2023 to July 2024
+663

Where Warren County is

The Census internal point of Warren County is at 38.761900, -91.159300. It sits in UTM zone 15N. The map shades Missouri's 115 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Warren County outlined. Dots are towns of 1,000+ people with residents in it.

Pettis County: +1.8%Henry County: +2.7%Texas County: +5.7%Madison County: +1.8%St. Louis city: -6.9%Cole County: +1.3%Washington County: +0.6%Macon County: -0.1%Barton County: +0.8%Grundy County: +0.1%Cedar County: +5.7%Randolph County: -1.6%Ray County: +0.3%Caldwell County: +2.0%Benton County: +6.1%Douglas County: +5.9%Shannon County: +3.4%Dade County: +0.5%Wright County: +7.1%Gentry County: +2.6%Lawrence County: +3.0%Cooper County: +2.9%Hickory County: +5.6%Moniteau County: +0.5%Dent County: +2.3%Monroe County: +2.3%Maries County: +0.7%Bollinger County: +0.5%Clinton County: +2.4%Knox County: +0.0%Webster County: +7.8%Harrison County: +0.4%Pulaski County: -0.1%Adair County: +1.5%Warren County: +7.7%Daviess County: +1.3%Audrain County: -1.9%Howard County: -0.1%Linn County: +0.4%Saline County: -0.1%Miller County: +3.6%Dallas County: +4.3%Morgan County: +6.7%New Madrid County: -6.8%Newton County: +4.8%Oregon County: +1.0%Franklin County: +2.3%Greene County: +2.9%Ralls County: +1.4%Lafayette County: +1.4%Livingston County: +4.8%McDonald County: +3.3%Barry County: +3.1%Cape Girardeau County: +2.2%Carroll County: -0.6%Christian County: +7.6%Vernon County: +0.6%Carter County: +3.0%Andrew County: -0.1%Jasper County: +2.9%Worth County: -4.9%Lincoln County: +10.1%Marion County: -0.2%Holt County: +1.2%Howell County: +2.4%St. Francois County: +1.6%Chariton County: +0.1%Butler County: -0.6%Iron County: -1.0%Perry County: +0.7%Cass County: +5.3%St. Louis County: -1.0%Dunklin County: -4.3%Wayne County: -1.1%Ozark County: +6.7%Laclede County: +1.9%Reynolds County: -2.5%Lewis County: -1.9%Taney County: +1.2%Ripley County: +0.4%Ste. Genevieve County: +0.4%Scotland County: -0.1%Putnam County: -3.1%Schuyler County: +1.5%Shelby County: -2.8%Boone County: +4.4%Mercer County: -1.7%Platte County: +5.6%Camden County: +3.1%Bates County: +2.1%Johnson County: +3.4%Sullivan County: -3.8%Atchison County: -3.1%Scott County: -0.2%Montgomery County: +2.0%Jefferson County: +2.2%Clark County: -0.5%Callaway County: +1.8%St. Clair County: +5.4%Buchanan County: -1.1%Pemiscot County: -7.6%Polk County: +4.6%Phelps County: +2.5%Stone County: +4.6%Osage County: +1.7%Clay County: +3.6%Nodaway County: -2.4%Crawford County: -1.0%Jackson County: +1.4%St. Charles County: +4.3%Mississippi County: -3.1%Pike County: +3.1%Stoddard County: -0.7%Gasconade County: -0.7%DeKalb County: -14.8%
Change 2020 to 2024
  1. < -0.7%
  2. < +0.5%
  3. < +2.0%
  4. < +3.6%
  5. ≥ +3.6%
no data

Orange pin: Warren County internal point. Dark pin: Jefferson City.

Internal point

Decimal
38.761900, -91.159300
DMS
38°45'42.84"N 91°09'33.48"W
UTM
15N 659928.3E 4291963.6N
Geohash
9yzht87u6
Plus code
86CCQR6R+Q7

Towns in Warren County

3 incorporated places of 1,000+ people have residents in Warren County, 16,445 people together, or 43% of the county. Each figure counts only the part of the town inside Warren County; towns marked "part" extend into another county. The largest is Warrenton with 9,420.

  1. 01Warrenton9,420
  2. 02Wright City5,723
  3. 03Marthasville1,302
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Warren County

The Census 2024 county adjacency file lists 5 neighbors for Warren County. The most populous is St. Charles County, MO, with 423,726 residents. Distances run between Census internal points in a straight line.

Distance to Jefferson City and the nearest big city

Jefferson City is 56.1 miles WSW of Warren County's internal point in a straight line. The nearest place of 100,000 or more is St. Louis, MO (population 279,695), 50.1 miles away. The nearest place of 10,000 or more is Wentzville, MO (population 48,646), 16.0 miles away.

Warren County FIPS code

The FIPS code of Warren County is 29219: state code 29 for Missouri plus county code 219. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $77,075.

Questions people ask

What is the population of Warren County, Missouri?

The Census Vintage 2024 estimate for July 1, 2024 is 38,478. That is up 2,738 people (7.7%) from the July 2020 estimate of 35,740.

What is the FIPS code of Warren County?

29219. The first two digits (29) are Missouri; the last three (219) identify the county.

What is the largest town in Warren County?

Warrenton, with 9,420 residents inside Warren County in 2024.

Which counties border Warren County?

5 county-equivalents border it in the Census 2024 adjacency file: St. Charles County, MO; Franklin County, MO; Lincoln County, MO; Gasconade County, MO; Montgomery County, MO.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.