Washtenaw County Population

1830–2026

371.47K

2026 projection

0.1% since 2020 (decrease)

0100K200K300K400K1850190019502000

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Washtenaw County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026371,472+1,2580.34%
2025370,214+1,2580.34%
2024368,956+1,1110.30%
2023367,845+5380.15%
2022367,307+2,3660.65%
2021364,941-6,8731.85%
2020371,814+3,5720.97%
2019368,242-2,3060.62%
2018370,548+8450.23%
2017369,703+2,7430.75%

Showing 10 of 34 years.

Washtenaw County Demographics

35median age

Median age

Female36.1 yrs
Male34 yrs

Adults

302,348
58,242 seniors (65+) · 19% of adults244,106 other adults

Sex

Female 50.1% · 185,350Male 49.9% · 184,472

Population by age

MaleFemale85+ years, male: 2,48785+ years, female: 3,72980–84 years, male: 2,83880–84 years, female: 3,98775–79 years, male: 4,78575–79 years, female: 5,76770–74 years, male: 7,32370–74 years, female: 8,77965–69 years, male: 8,92165–69 years, female: 9,62660–64 years, male: 10,57660–64 years, female: 10,57255–59 years, male: 9,72855–59 years, female: 10,41650–54 years, male: 10,50050–54 years, female: 10,51445–49 years, male: 9,99045–49 years, female: 9,95840–44 years, male: 10,47740–44 years, female: 10,64435–39 years, male: 12,25935–39 years, female: 10,97930–34 years, male: 13,00830–34 years, female: 11,85625–29 years, male: 14,21925–29 years, female: 13,38620–24 years, male: 23,32620–24 years, female: 21,38615–19 years, male: 15,99215–19 years, female: 16,94510–14 years, male: 10,17510–14 years, female: 9,9685–9 years, male: 9,1955–9 years, female: 8,5700–4 years, male: 8,6730–4 years, female: 8,26885+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–410K10K20K20K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 3,698 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Washtenaw County Income

$89,180median household income

Median household income

$89,180

Half of households earn more, half earn less

Median earnings

$60,100

Typical yearly pay for a worker 25 or older.

Poverty rate

14.2%

About 1 in 7 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Washtenaw County Marital Status

44% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married44%45%43%
Never married43%45%40%
Divorced8%7%10%
Widowed4%2%6%
Separated<1%<1%<1%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

8 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year