Warren County Demographics

A map of Warren County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	204,562	198,227	81.8%	81.8%
Asian	17,958	17,278	7.2%	7.1%
Multiracial	9,024	9,769	3.6%	4.0%
Hispanic	8,749	7,738	3.5%	3.2%
Black	7,904	8,175	3.2%	3.4%
Native American/Other	1,811	1,150	0.7%	0.5%

Warren County, Ohio has an estimated population of 250,008, an increase from the 242,337 recorded in the 2020 Census. The population is 81.8% White, 7.2% Asian, 3.6% Multiracial, 3.5% Hispanic, 3.2% Black, and 0.7% 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 is about as racially diverse as it was in the 2020 Census. It is considerably less diverse than Ohio 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 32.2% in 2020 and 32.2% in the most recent ACS estimates.

Warren County is ranked the 10th most populous county in Ohio, out of 88 counties. Warren County was ranked the 10th most populous county in the 2020 Census.

Warren County's White Population

204,562 residents of Warren County, or 81.8% of the population, identify as White. The share of White residents in Warren County is higher than in Ohio overall, where 75.8% of the population is White. Warren County ranks 74th statewide in terms of White residents as a share of the population, out of 88 counties.

Since the 2020 Census, Warren County's White population has grown by an estimated 3.2%. White residents' share of Warren County's population has remained roughly unchanged at 81.8%.

Warren County is more White than neighboring Montgomery County (67.7% White), Greene County (81.3% White), and Butler County (74.6% White). Warren County is less White than neighboring Clinton County (91.7% White), and Clermont County (90.6% White).

Warren County's Black Population

7,904 residents of Warren County, or 3.2% of the population, identify as Black. The share of Black residents in Warren County is lower than in Ohio overall, where 12% of the population is Black. Warren County ranks 31st statewide in terms of Black residents as a share of the population, out of 88 counties.

Since the 2020 Census, Warren County's Black population has declined by an estimated 3.3%. Black residents' share of Warren County's population has remained roughly unchanged at 3.2%.

Warren County is more Black than neighboring Clinton County (1.8% Black), and Clermont County (1.5% Black). Warren County is less Black than neighboring Montgomery County (20.4% Black), Greene County (5.8% Black), and Butler County (8.3% Black).

Warren County's Asian Population

17,958 residents of Warren County, or 7.2% of the population, identify as Asian. The share of Asian residents in Warren County is slightly higher than in Ohio overall, where 2.5% of the population is Asian. Warren County ranks 2nd statewide in terms of Asian residents as a share of the population, out of 88 counties.

Since the 2020 Census, Warren County's Asian population has grown by an estimated 3.9%. Asian residents' share of Warren County's population has remained roughly unchanged at 7.2%.

Warren County is more Asian than neighboring Montgomery County (2.2% Asian), Clinton County (0.3% Asian), Clermont County (1.1% Asian), Greene County (3% Asian), and Butler County (4.3% Asian).

Warren County's Hispanic Population

8,749 residents of Warren County, or 3.5% of the population, identify as Hispanic. The share of Hispanic residents in Warren County is comparable to the share in Ohio overall, where 4.8% of the population is Hispanic. Warren County ranks 29th statewide in terms of Hispanic residents as a share of the population, out of 88 counties.

Since the 2020 Census, Warren County's Hispanic population has grown by an estimated 13.1%. Hispanic residents' share of Warren County's population has remained roughly unchanged at 3.5%.

Warren County is more Hispanic than neighboring Clinton County (2.3% Hispanic), Clermont County (2.6% Hispanic), and Greene County (3.3% Hispanic). Warren County is less Hispanic than neighboring Montgomery County (4.2% Hispanic), and Butler County (7% Hispanic).

Warren County's Native American/Other Population

1,811 residents of Warren County, or 0.7% 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 Ohio overall, where 0.5% of the population is Native American/Other. Warren County ranks 45th statewide in terms of Native American/Other residents as a share of the population, out of 88 counties.

Since the 2020 Census, Warren County's Native American/Other population has grown by an estimated 57.5%. Native American/Other residents' share of Warren County's population has remained roughly unchanged at 0.7%.

Warren County is more Native American/Other than neighboring Montgomery County (0.5% Native American/Other), Clinton County (0.3% Native American/Other), Clermont County (0.6% Native American/Other), and Butler County (0.6% Native American/Other). Warren County is less Native American/Other than neighboring Greene County (0.9% Native American/Other).

Warren County's Multiracial Population

9,024 residents of Warren County, or 3.6% of the population, identify as Multiracial. The share of Multiracial residents in Warren County is comparable to the share in Ohio overall, where 4.3% of the population is Multiracial. Warren County ranks 33rd statewide in terms of Multiracial residents as a share of the population, out of 88 counties.

Since the 2020 Census, Warren County's Multiracial population has declined by an estimated 7.6%. Multiracial residents' share of Warren County's population has remained roughly unchanged at 3.6%.

Warren County is less Multiracial than neighboring Montgomery County (5% Multiracial), Greene County (5.8% Multiracial), and Butler County (5.3% 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.