Washtenaw County Demographics

A map of Washtenaw County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	248,370	252,220	67.2%	67.8%
Black	41,665	42,125	11.3%	11.3%
Asian	34,078	33,517	9.2%	9.0%
Multiracial	21,551	20,716	5.8%	5.6%
Hispanic	21,403	20,731	5.8%	5.6%
Native American/Other	2,755	2,949	0.7%	0.8%

Washtenaw County, Michigan has an estimated population of 369,822, a less than 1% change from the 372,258 recorded in the 2020 Census. The population is 67.2% White, 11.3% Black, 9.2% Asian, 5.8% Hispanic, 5.8% Multiracial, and 0.7% Native American/Other. This demographic dot map shows the population of Washtenaw County, with one dot drawn for each person counted by the Census, color-coded by race.

Washtenaw has become slightly more racially diverse since the 2020 Census. It is considerably more diverse than Michigan overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Washtenaw County, that probability was 51.4% in 2020 and 52.1% in the most recent ACS estimates.

Washtenaw County is ranked the 6th most populous county in Michigan, out of 83 counties. Washtenaw County was ranked the 6th most populous county in the 2020 Census.

Washtenaw County's White Population

248,370 residents of Washtenaw County, or 67.2% of the population, identify as White. The share of White residents in Washtenaw County is lower than in Michigan overall, where 72.4% of the population is White. Washtenaw County ranks 79th statewide in terms of White residents as a share of the population, out of 83 counties.

Since the 2020 Census, Washtenaw County's White population has declined by an estimated 1.5%. White residents' share of Washtenaw County's population has decreased from 67.8% to 67.2%.

Washtenaw County is more White than neighboring Wayne County (47.9% White). Washtenaw County is less White than neighboring Livingston County (92.4% White), Lenawee County (84.8% White), Monroe County (88.5% White), and Jackson County (82% White).

Washtenaw County's Black Population

41,665 residents of Washtenaw County, or 11.3% of the population, identify as Black. The share of Black residents in Washtenaw County is comparable to the share in Michigan overall, where 13.1% of the population is Black. Washtenaw County ranks 10th statewide in terms of Black residents as a share of the population, out of 83 counties.

Since the 2020 Census, Washtenaw County's Black population has declined by an estimated 1.1%. Black residents' share of Washtenaw County's population has remained roughly unchanged at 11.3%.

Washtenaw County is more Black than neighboring Livingston County (0.6% Black), Lenawee County (2.3% Black), Monroe County (2.2% Black), and Jackson County (7.4% Black). Washtenaw County is less Black than neighboring Wayne County (36.6% Black).

Washtenaw County's Asian Population

34,078 residents of Washtenaw County, or 9.2% of the population, identify as Asian. The share of Asian residents in Washtenaw County is higher than in Michigan overall, where 3.4% of the population is Asian. Washtenaw County ranks 1st statewide in terms of Asian residents as a share of the population, out of 83 counties.

Since the 2020 Census, Washtenaw County's Asian population has grown by an estimated 1.7%. Asian residents' share of Washtenaw County's population has remained roughly unchanged at 9.2%.

Washtenaw County is more Asian than neighboring Livingston County (0.9% Asian), Lenawee County (0.3% Asian), Monroe County (0.4% Asian), Wayne County (3.7% Asian), and Jackson County (0.8% Asian).

Washtenaw County's Hispanic Population

21,403 residents of Washtenaw County, or 5.8% of the population, identify as Hispanic. The share of Hispanic residents in Washtenaw County is comparable to the share in Michigan overall, where 5.9% of the population is Hispanic. Washtenaw County ranks 20th statewide in terms of Hispanic residents as a share of the population, out of 83 counties.

Since the 2020 Census, Washtenaw County's Hispanic population has grown by an estimated 3.2%. Hispanic residents' share of Washtenaw County's population has remained roughly unchanged at 5.8%.

Washtenaw County is more Hispanic than neighboring Livingston County (3% Hispanic), Monroe County (4.4% Hispanic), and Jackson County (4.1% Hispanic). Washtenaw County is less Hispanic than neighboring Lenawee County (8.9% Hispanic), and Wayne County (6.9% Hispanic).

Washtenaw County's Native American/Other Population

2,755 residents of Washtenaw 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 Washtenaw County is comparable to the share in Michigan overall, where 0.8% of the population is Native American/Other. Washtenaw County ranks 47th statewide in terms of Native American/Other residents as a share of the population, out of 83 counties.

Since the 2020 Census, Washtenaw County's Native American/Other population has declined by an estimated 6.6%. Native American/Other residents' share of Washtenaw County's population has remained roughly unchanged at 0.7%.

Washtenaw County is more Native American/Other than neighboring Livingston County (0.5% Native American/Other), Lenawee County (0.4% Native American/Other), Monroe County (0.5% Native American/Other), and Jackson County (0.5% Native American/Other).

Washtenaw County's Multiracial Population

21,551 residents of Washtenaw County, or 5.8% of the population, identify as Multiracial. The share of Multiracial residents in Washtenaw County is comparable to the share in Michigan overall, where 4.5% of the population is Multiracial. Washtenaw County ranks 7th statewide in terms of Multiracial residents as a share of the population, out of 83 counties.

Since the 2020 Census, Washtenaw County's Multiracial population has grown by an estimated 4.0%. Multiracial residents' share of Washtenaw County's population has remained roughly unchanged at 5.8%.

Washtenaw County is more Multiracial than neighboring Livingston County (2.6% Multiracial), Lenawee County (3.3% Multiracial), Monroe County (4.1% Multiracial), Wayne County (4.3% Multiracial), and Jackson County (5.4% 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.