Washington County Demographics

A map of Washington County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	114,121	115,223	73.3%	74.5%
Black	17,838	17,241	11.5%	11.1%
Hispanic	12,297	10,289	7.9%	6.7%
Multiracial	8,307	7,822	5.3%	5.1%
Asian	2,531	3,083	1.6%	2.0%
Native American/Other	615	1,047	0.4%	0.7%

Washington County, Maryland has an estimated population of 155,709, a less than 1% change from the 154,705 recorded in the 2020 Census. The population is 73.3% White, 11.5% Black, 7.9% Hispanic, 5.3% Multiracial, 1.6% Asian, and 0.4% Native American/Other. This demographic dot map shows the population of Washington County, with one dot drawn for each person counted by the Census, color-coded by race.

Washington has become more racially diverse since the 2020 Census. It is considerably less diverse than Maryland overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Washington County, that probability was 42.5% in 2020 and 44.0% in the most recent ACS estimates.

Washington County is ranked the 11th most populous county in Maryland, out of 24 counties. Washington County was ranked the 11th most populous county in the 2020 Census.

Washington County's White Population

114,121 residents of Washington County, or 73.3% of the population, identify as White. The share of White residents in Washington County is significantly higher than in Maryland overall, where 46.6% of the population is White. Washington County ranks 9th statewide in terms of White residents as a share of the population, out of 24 counties.

Since the 2020 Census, Washington County's White population has remained roughly the same. White residents' share of Washington County's population has decreased from 74.5% to 73.3%.

Washington County is more White than neighboring Frederick County (65.7% White). Washington County is less White than neighboring Berkeley County (79.7% White), Jefferson County (79.5% White), Franklin County (84.3% White), and Fulton County (93.2% White).

Washington County's Black Population

17,838 residents of Washington County, or 11.5% of the population, identify as Black. The share of Black residents in Washington County is significantly lower than in Maryland overall, where 28.9% of the population is Black. Washington County ranks 18th statewide in terms of Black residents as a share of the population, out of 24 counties.

Since the 2020 Census, Washington County's Black population has grown by an estimated 3.5%. Black residents' share of Washington County's population has remained roughly unchanged at 11.5%.

Washington County is more Black than neighboring Berkeley County (7.1% Black), Jefferson County (5.6% Black), Franklin County (3% Black), Frederick County (10.1% Black), and Fulton County (1.3% Black).

Washington County's Asian Population

2,531 residents of Washington County, or 1.6% of the population, identify as Asian. The share of Asian residents in Washington County is slightly lower than in Maryland overall, where 6.5% of the population is Asian. Washington County ranks 13th statewide in terms of Asian residents as a share of the population, out of 24 counties.

Since the 2020 Census, Washington County's Asian population has declined by an estimated 17.9%. Asian residents' share of Washington County's population has remained roughly unchanged at 1.6%.

Washington County is more Asian than neighboring Berkeley County (1% Asian), Jefferson County (1.4% Asian), Franklin County (1% Asian), and Fulton County (0.2% Asian). Washington County is less Asian than neighboring Frederick County (5.9% Asian).

Washington County's Hispanic Population

12,297 residents of Washington County, or 7.9% of the population, identify as Hispanic. The share of Hispanic residents in Washington County is slightly lower than in Maryland overall, where 12.5% of the population is Hispanic. Washington County ranks 12th statewide in terms of Hispanic residents as a share of the population, out of 24 counties.

Since the 2020 Census, Washington County's Hispanic population has grown by an estimated 19.5%. Hispanic residents' share of Washington County's population has increased from 6.7% to 7.9%.

Washington County is more Hispanic than neighboring Berkeley County (6.4% Hispanic), Jefferson County (7.8% Hispanic), Franklin County (7.5% Hispanic), and Fulton County (1.3% Hispanic). Washington County is less Hispanic than neighboring Frederick County (12.9% Hispanic).

Washington County's Native American/Other Population

615 residents of Washington County, or 0.4% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Washington County is comparable to the share in Maryland overall, where 0.8% of the population is Native American/Other. Washington County ranks 13th statewide in terms of Native American/Other residents as a share of the population, out of 24 counties.

Since the 2020 Census, Washington County's Native American/Other population has declined by an estimated 41.3%. Native American/Other residents' share of Washington County's population has remained roughly unchanged at 0.4%.

Washington County is less Native American/Other than neighboring Berkeley County (0.9% Native American/Other), Jefferson County (0.7% Native American/Other), and Fulton County (1.2% Native American/Other).

Washington County's Multiracial Population

8,307 residents of Washington County, or 5.3% of the population, identify as Multiracial. The share of Multiracial residents in Washington County is comparable to the share in Maryland overall, where 4.6% of the population is Multiracial. Washington County ranks 7th statewide in terms of Multiracial residents as a share of the population, out of 24 counties.

Since the 2020 Census, Washington County's Multiracial population has grown by an estimated 6.2%. Multiracial residents' share of Washington County's population has remained roughly unchanged at 5.3%.

Washington County is more Multiracial than neighboring Berkeley County (5% Multiracial), Jefferson County (5% Multiracial), Franklin County (3.7% Multiracial), Frederick County (5% Multiracial), and Fulton County (2.8% 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.