Somerset County Demographics

A map of Somerset County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	172,324	177,411	49.3%	51.4%
Asian	68,440	67,098	19.6%	19.4%
Hispanic	61,585	57,379	17.6%	16.6%
Black	32,411	30,480	9.3%	8.8%
Multiracial	12,623	10,603	3.6%	3.1%
Native American/Other	2,463	2,390	0.7%	0.7%

Somerset County, New Jersey has an estimated population of 349,846, a slight increase from the 345,361 recorded in the 2020 Census. The population is 49.3% White, 19.6% Asian, 17.6% Hispanic, 9.3% Black, 3.6% Multiracial, and 0.7% Native American/Other. This demographic dot map shows the population of Somerset County, with one dot drawn for each person counted by the Census, color-coded by race.

Somerset has become more racially diverse since the 2020 Census. It is more 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 Somerset County, that probability was 66.2% in 2020 and 67.8% in the most recent ACS estimates.

Somerset County is ranked the 13th most populous county in New Jersey, out of 21 counties. Somerset County was ranked the 13th most populous county in the 2020 Census.

Somerset County's White Population

172,324 residents of Somerset County, or 49.3% of the population, identify as White. The share of White residents in Somerset County is comparable to the share in New Jersey overall, where 50.9% of the population is White. Somerset County ranks 14th statewide in terms of White residents as a share of the population, out of 21 counties.

Since the 2020 Census, Somerset County's White population has declined by an estimated 2.9%. White residents' share of Somerset County's population has decreased from 51.4% to 49.3%.

Somerset County is more White than neighboring Middlesex County (37.5% White), Mercer County (42.7% White), and Union County (35.4% White). Somerset County is less White than neighboring Hunterdon County (79.9% White), and Morris County (65.8% White).

Somerset County's Black Population

32,411 residents of Somerset County, or 9.3% of the population, identify as Black. The share of Black residents in Somerset County is slightly lower than in New Jersey overall, where 12.2% of the population is Black. Somerset County ranks 13th statewide in terms of Black residents as a share of the population, out of 21 counties.

Since the 2020 Census, Somerset County's Black population has grown by an estimated 6.3%. Black residents' share of Somerset County's population has increased from 8.8% to 9.3%.

Somerset County is more Black than neighboring Hunterdon County (2.4% Black), and Morris County (3% Black). Somerset County is less Black than neighboring Middlesex County (9.7% Black), Mercer County (17.9% Black), and Union County (19.1% Black).

Somerset County's Asian Population

68,440 residents of Somerset County, or 19.6% of the population, identify as Asian. The share of Asian residents in Somerset County is higher than in New Jersey overall, where 10% of the population is Asian. Somerset County ranks 2nd statewide in terms of Asian residents as a share of the population, out of 21 counties.

Since the 2020 Census, Somerset County's Asian population has grown by an estimated 2.0%. Asian residents' share of Somerset County's population has remained roughly unchanged at 19.6%.

Somerset County is more Asian than neighboring Mercer County (12.3% Asian), Hunterdon County (4.9% Asian), Morris County (10.7% Asian), and Union County (5.6% Asian). Somerset County is less Asian than neighboring Middlesex County (25.4% Asian).

Somerset County's Hispanic Population

61,585 residents of Somerset County, or 17.6% of the population, identify as Hispanic. The share of Hispanic residents in Somerset County is slightly lower than in New Jersey overall, where 22.5% of the population is Hispanic. Somerset County ranks 11th statewide in terms of Hispanic residents as a share of the population, out of 21 counties.

Since the 2020 Census, Somerset County's Hispanic population has grown by an estimated 7.3%. Hispanic residents' share of Somerset County's population has increased from 16.6% to 17.6%.

Somerset County is more Hispanic than neighboring Hunterdon County (9.3% Hispanic), and Morris County (16% Hispanic). Somerset County is less Hispanic than neighboring Middlesex County (23.6% Hispanic), Mercer County (23.1% Hispanic), and Union County (35.2% Hispanic).

Somerset County's Native American/Other Population

2,463 residents of Somerset 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 Somerset County is comparable to the share in New Jersey overall, where 0.9% of the population is Native American/Other. Somerset County ranks 12th statewide in terms of Native American/Other residents as a share of the population, out of 21 counties.

Since the 2020 Census, Somerset County's Native American/Other population has grown by an estimated 3.1%. Native American/Other residents' share of Somerset County's population has remained roughly unchanged at 0.7%.

Somerset County is more Native American/Other than neighboring Mercer County (0.6% Native American/Other), and Hunterdon County (0.5% Native American/Other). Somerset County is less Native American/Other than neighboring Middlesex County (0.9% Native American/Other), Morris County (0.8% Native American/Other), and Union County (1.3% Native American/Other).

Somerset County's Multiracial Population

12,623 residents of Somerset County, or 3.6% of the population, identify as Multiracial. The share of Multiracial residents in Somerset County is comparable to the share in New Jersey overall, where 3.5% of the population is Multiracial. Somerset County ranks 13th statewide in terms of Multiracial residents as a share of the population, out of 21 counties.

Since the 2020 Census, Somerset County's Multiracial population has grown by an estimated 19.1%. Multiracial residents' share of Somerset County's population has increased from 3.1% to 3.6%.

Somerset County is more Multiracial than neighboring Middlesex County (2.9% Multiracial), Mercer County (3.4% Multiracial), Hunterdon County (3% Multiracial), and Union County (3.4% Multiracial). Somerset County is less Multiracial than neighboring 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.