Delaware County Demographics

A map of Delaware County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	361,386	363,249	62.4%	63.0%
Black	126,799	127,055	21.9%	22.0%
Asian	36,677	36,317	6.3%	6.3%
Hispanic	29,222	26,772	5.0%	4.6%
Multiracial	21,762	20,032	3.8%	3.5%
Native American/Other	3,376	3,405	0.6%	0.6%

Delaware County, Pennsylvania has an estimated population of 579,222, a less than 1% change from the 576,830 recorded in the 2020 Census. The population is 62.4% White, 21.9% Black, 6.3% Asian, 5.0% Hispanic, 3.8% Multiracial, and 0.6% Native American/Other. This demographic dot map shows the population of Delaware County, with one dot drawn for each person counted by the Census, color-coded by race.

Delaware has become slightly more racially diverse since the 2020 Census. It is considerably more diverse than Pennsylvania overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Delaware County, that probability was 54.8% in 2020 and 55.5% in the most recent ACS estimates.

Delaware County is ranked the 5th most populous county in Pennsylvania, out of 67 counties. Delaware County was ranked the 5th most populous county in the 2020 Census.

Delaware County's White Population

361,386 residents of Delaware County, or 62.4% of the population, identify as White. The share of White residents in Delaware County is considerably lower than in Pennsylvania overall, where 73% of the population is White. Delaware County ranks 63rd statewide in terms of White residents as a share of the population, out of 67 counties.

Since the 2020 Census, Delaware County's White population has remained roughly the same. White residents' share of Delaware County's population has decreased from 63.0% to 62.4%.

Delaware County is more White than neighboring Philadelphia County (33.2% White). Delaware County is less White than neighboring Montgomery County (71.5% White), Gloucester County (74.3% White), Salem County (70.2% White), and Chester County (75.4% White).

Delaware County's Black Population

126,799 residents of Delaware County, or 21.9% of the population, identify as Black. The share of Black residents in Delaware County is considerably higher than in Pennsylvania overall, where 10.3% of the population is Black. Delaware County ranks 2nd statewide in terms of Black residents as a share of the population, out of 67 counties.

Since the 2020 Census, Delaware County's Black population has remained roughly the same. Black residents' share of Delaware County's population has remained roughly unchanged at 21.9%.

Delaware County is more Black than neighboring Montgomery County (9.2% Black), Gloucester County (10.2% Black), Salem County (13.2% Black), and Chester County (4.9% Black). Delaware County is less Black than neighboring Philadelphia County (38.3% Black).

Delaware County's Asian Population

36,677 residents of Delaware County, or 6.3% of the population, identify as Asian. The share of Asian residents in Delaware County is slightly higher than in Pennsylvania overall, where 3.8% of the population is Asian. Delaware County ranks 5th statewide in terms of Asian residents as a share of the population, out of 67 counties.

Since the 2020 Census, Delaware County's Asian population has remained roughly the same. Asian residents' share of Delaware County's population has remained roughly unchanged at 6.3%.

Delaware County is more Asian than neighboring Gloucester County (3.1% Asian), and Salem County (1% Asian). Delaware County is less Asian than neighboring Philadelphia County (7.9% Asian), Montgomery County (8% Asian), and Chester County (6.7% Asian).

Delaware County's Hispanic Population

29,222 residents of Delaware County, or 5.0% of the population, identify as Hispanic. The share of Hispanic residents in Delaware County is slightly lower than in Pennsylvania overall, where 8.7% of the population is Hispanic. Delaware County ranks 21st statewide in terms of Hispanic residents as a share of the population, out of 67 counties.

Since the 2020 Census, Delaware County's Hispanic population has grown by an estimated 9.2%. Hispanic residents' share of Delaware County's population has remained roughly unchanged at 5.0%.

Delaware County is less Hispanic than neighboring Philadelphia County (15.6% Hispanic), Montgomery County (6.7% Hispanic), Gloucester County (8.3% Hispanic), Salem County (11.3% Hispanic), and Chester County (8.4% Hispanic).

Delaware County's Native American/Other Population

3,376 residents of Delaware County, or 0.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Delaware County is comparable to the share in Pennsylvania overall, where 0.6% of the population is Native American/Other. Delaware County ranks 8th statewide in terms of Native American/Other residents as a share of the population, out of 67 counties.

Since the 2020 Census, Delaware County's Native American/Other population has remained roughly the same. Native American/Other residents' share of Delaware County's population has remained roughly unchanged at 0.6%.

Delaware County is more Native American/Other than neighboring Gloucester County (0.5% Native American/Other), Salem County (0.5% Native American/Other), and Chester County (0.4% Native American/Other). Delaware County is less Native American/Other than neighboring Philadelphia County (0.9% Native American/Other).

Delaware County's Multiracial Population

21,762 residents of Delaware County, or 3.8% of the population, identify as Multiracial. The share of Multiracial residents in Delaware County is comparable to the share in Pennsylvania overall, where 3.6% of the population is Multiracial. Delaware County ranks 26th statewide in terms of Multiracial residents as a share of the population, out of 67 counties.

Since the 2020 Census, Delaware County's Multiracial population has grown by an estimated 8.6%. Multiracial residents' share of Delaware County's population has remained roughly unchanged at 3.8%.

Delaware County is more Multiracial than neighboring Gloucester County (3.6% Multiracial). Delaware County is less Multiracial than neighboring Philadelphia County (4.1% Multiracial), Montgomery County (4% Multiracial), Salem County (3.9% Multiracial), and Chester County (4.1% 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.