Warren County Demographics

A map of Warren County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	33,253	31,103	89.4%	87.5%
Multiracial	1,755	1,941	4.7%	5.5%
Hispanic	1,530	1,400	4.1%	3.9%
Black	401	718	1.1%	2.0%
Asian	159	143	0.4%	0.4%
Native American/Other	79	227	0.2%	0.6%

Warren County, Missouri has an estimated population of 37,177, an increase from the 35,532 recorded in the 2020 Census. The population is 89.4% White, 4.7% Multiracial, 4.1% Hispanic, 1.1% Black, 0.4% Asian, and 0.2% Native American/Other. This demographic dot map shows the population of Warren County, with one dot drawn for each person counted by the Census, color-coded by race.

Warren has become less racially diverse since the 2020 Census. It is considerably less diverse than Missouri overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Warren County, that probability was 22.9% in 2020 and 19.6% in the most recent ACS estimates.

Warren County is ranked the 32nd most populous county in Missouri, out of 115 counties. Warren County was ranked the 33rd most populous county in the 2020 Census.

Warren County's White Population

33,253 residents of Warren County, or 89.4% of the population, identify as White. The share of White residents in Warren County is considerably higher than in Missouri overall, where 76.3% of the population is White. Warren County ranks 76th statewide in terms of White residents as a share of the population, out of 115 counties.

Since the 2020 Census, Warren County's White population has grown by an estimated 6.9%. White residents' share of Warren County's population has increased from 87.5% to 89.4%.

Warren County is more White than neighboring Franklin County (88.7% White), and St. Charles County (83% White). Warren County is less White than neighboring Lincoln County (91.9% White), Montgomery County (92.3% White), and Gasconade County (94.3% White).

Warren County's Black Population

401 residents of Warren County, or 1.1% of the population, identify as Black. The share of Black residents in Warren County is lower than in Missouri overall, where 10.9% of the population is Black. Warren County ranks 40th statewide in terms of Black residents as a share of the population, out of 115 counties.

Since the 2020 Census, Warren County's Black population has declined by an estimated 44.2%. Black residents' share of Warren County's population has decreased from 2.0% to 1.1%.

Warren County is more Black than neighboring Montgomery County (0.8% Black), Franklin County (0.9% Black), and Gasconade County (0.9% Black). Warren County is less Black than neighboring Lincoln County (1.7% Black), and St. Charles County (5% Black).

Warren County's Asian Population

159 residents of Warren County, or 0.4% of the population, identify as Asian. The share of Asian residents in Warren County is comparable to the share in Missouri overall, where 2.1% of the population is Asian. Warren County ranks 48th statewide in terms of Asian residents as a share of the population, out of 115 counties.

Since the 2020 Census, Warren County's Asian population has grown by an estimated 11.2%. Asian residents' share of Warren County's population has remained roughly unchanged at 0.4%.

Warren County is more Asian than neighboring Lincoln County (0.3% Asian), Montgomery County (0.1% Asian), and Gasconade County (0.1% Asian). Warren County is less Asian than neighboring St. Charles County (3% Asian).

Warren County's Hispanic Population

1,530 residents of Warren County, or 4.1% of the population, identify as Hispanic. The share of Hispanic residents in Warren County is comparable to the share in Missouri overall, where 5.2% of the population is Hispanic. Warren County ranks 24th statewide in terms of Hispanic residents as a share of the population, out of 115 counties.

Since the 2020 Census, Warren County's Hispanic population has grown by an estimated 9.3%. Hispanic residents' share of Warren County's population has remained roughly unchanged at 4.1%.

Warren County is more Hispanic than neighboring Lincoln County (2.9% Hispanic), Montgomery County (2.3% Hispanic), Franklin County (2.3% Hispanic), and Gasconade County (1.6% Hispanic). Warren County is less Hispanic than neighboring St. Charles County (4.2% Hispanic).

Warren County's Native American/Other Population

79 residents of Warren County, or 0.2% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Warren County is comparable to the share in Missouri overall, where 0.7% of the population is Native American/Other. Warren County ranks 64th statewide in terms of Native American/Other residents as a share of the population, out of 115 counties.

Since the 2020 Census, Warren County's Native American/Other population has declined by an estimated 65.2%. Native American/Other residents' share of Warren County's population has remained roughly unchanged at 0.2%.

Warren County is less Native American/Other than neighboring Montgomery County (0.5% Native American/Other), Franklin County (0.3% Native American/Other), Gasconade County (0.5% Native American/Other), and St. Charles County (0.5% Native American/Other).

Warren County's Multiracial Population

1,755 residents of Warren County, or 4.7% of the population, identify as Multiracial. The share of Multiracial residents in Warren County is comparable to the share in Missouri overall, where 4.8% of the population is Multiracial. Warren County ranks 19th statewide in terms of Multiracial residents as a share of the population, out of 115 counties.

Since the 2020 Census, Warren County's Multiracial population has declined by an estimated 9.6%. Multiracial residents' share of Warren County's population has decreased from 5.5% to 4.7%.

Warren County is more Multiracial than neighboring Lincoln County (3% Multiracial), Montgomery County (3.9% Multiracial), Gasconade County (2.6% Multiracial), and St. Charles County (4.3% Multiracial). Warren County is less Multiracial than neighboring Franklin County (7.4% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.