Warren County Demographics

A map of Warren County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	82,718	84,255	74.6%	76.9%
Hispanic	14,378	12,225	13.0%	11.2%
Black	6,204	5,573	5.6%	5.1%
Multiracial	3,867	4,069	3.5%	3.7%
Asian	3,349	2,886	3.0%	2.6%
Native American/Other	333	624	0.3%	0.6%

Warren County, New Jersey has an estimated population of 110,849, a slight increase from the 109,632 recorded in the 2020 Census. The population is 74.6% White, 13.0% Hispanic, 5.6% Black, 3.5% Multiracial, 3.0% Asian, and 0.3% 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 more racially diverse since the 2020 Census. It is considerably less diverse than New Jersey 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 39.2% in 2020 and 42.1% in the most recent ACS estimates.

Warren County is ranked the 19th most populous county in New Jersey, out of 21 counties. Warren County was ranked the 19th most populous county in the 2020 Census.

Warren County's White Population

82,718 residents of Warren County, or 74.6% of the population, identify as White. The share of White residents in Warren County is significantly higher than in New Jersey overall, where 50.9% of the population is White. Warren County ranks 5th statewide in terms of White residents as a share of the population, out of 21 counties.

Since the 2020 Census, Warren County's White population has declined by an estimated 1.8%. White residents' share of Warren County's population has decreased from 76.9% to 74.6%.

Warren County is more White than neighboring Northampton County (72% White), Monroe County (60.4% White), and Morris County (65.8% White). Warren County is less White than neighboring Hunterdon County (79.9% White), and Sussex County (79.7% White).

Warren County's Black Population

6,204 residents of Warren County, or 5.6% of the population, identify as Black. The share of Black residents in Warren County is lower than in New Jersey overall, where 12.2% of the population is Black. Warren County ranks 16th statewide in terms of Black residents as a share of the population, out of 21 counties.

Since the 2020 Census, Warren County's Black population has grown by an estimated 11.3%. Black residents' share of Warren County's population has increased from 5.1% to 5.6%.

Warren County is more Black than neighboring Hunterdon County (2.4% Black), Sussex County (1.7% Black), and Morris County (3% Black). Warren County is less Black than neighboring Northampton County (5.7% Black), and Monroe County (13% Black).

Warren County's Asian Population

3,349 residents of Warren County, or 3.0% of the population, identify as Asian. The share of Asian residents in Warren County is lower than in New Jersey overall, where 10% of the population is Asian. Warren County ranks 16th statewide in terms of Asian residents as a share of the population, out of 21 counties.

Since the 2020 Census, Warren County's Asian population has grown by an estimated 16.0%. Asian residents' share of Warren County's population has remained roughly unchanged at 3.0%.

Warren County is more Asian than neighboring Monroe County (2.6% Asian), and Sussex County (2% Asian). Warren County is less Asian than neighboring Hunterdon County (4.9% Asian), and Morris County (10.7% Asian).

Warren County's Hispanic Population

14,378 residents of Warren County, or 13.0% of the population, identify as Hispanic. The share of Hispanic residents in Warren County is lower than in New Jersey overall, where 22.5% of the population is Hispanic. Warren County ranks 14th statewide in terms of Hispanic residents as a share of the population, out of 21 counties.

Since the 2020 Census, Warren County's Hispanic population has grown by an estimated 17.6%. Hispanic residents' share of Warren County's population has increased from 11.2% to 13.0%.

Warren County is more Hispanic than neighboring Hunterdon County (9.3% Hispanic), and Sussex County (11.9% Hispanic). Warren County is less Hispanic than neighboring Northampton County (15.5% Hispanic), Monroe County (18.2% Hispanic), and Morris County (16% Hispanic).

Warren County's Native American/Other Population

333 residents of Warren County, or 0.3% 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 New Jersey overall, where 0.9% of the population is Native American/Other. Warren County ranks 17th statewide in terms of Native American/Other residents as a share of the population, out of 21 counties.

Since the 2020 Census, Warren County's Native American/Other population has declined by an estimated 46.6%. Native American/Other residents' share of Warren County's population has remained roughly unchanged at 0.3%.

Warren County is less Native American/Other than neighboring Hunterdon County (0.5% Native American/Other), Northampton County (0.6% Native American/Other), Monroe County (1.6% Native American/Other), Sussex County (0.7% Native American/Other), and Morris County (0.8% Native American/Other).

Warren County's Multiracial Population

3,867 residents of Warren County, or 3.5% of the population, identify as Multiracial. The share of Multiracial residents in Warren County is comparable to the share in New Jersey overall, where 3.5% of the population is Multiracial. Warren County ranks 5th statewide in terms of Multiracial residents as a share of the population, out of 21 counties.

Since the 2020 Census, Warren County's Multiracial population has declined by an estimated 5.0%. Multiracial residents' share of Warren County's population has remained roughly unchanged at 3.5%.

Warren County is more Multiracial than neighboring Hunterdon County (3% Multiracial), and Northampton County (3.2% Multiracial). Warren County is less Multiracial than neighboring Monroe County (4.3% Multiracial), Sussex County (4% Multiracial), and Morris County (3.7% 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.