Washtenaw County Population 2018

Washtenaw County's estimated population is 367,627 with a growth rate of 0.79% in the past year according to the most recent United States census data. Washtenaw County is the 6th largest county in Michigan.

Year Population Growth Growth Rate
2017367,6272,8750.79%
2016364,7522,9370.81%
2015361,8153,1800.89%
2014358,6353,9211.11%
2013354,7143,3810.96%
2012351,3332,2310.64%
2011349,1023,5871.04%
2010345,51562,57822.12%
1990282,93718,1896.87%
1980264,74830,64513.09%
1970234,10361,66335.76%
1960172,44037,83428.11%
1950134,60653,79666.57%
194080,81015,28023.32%
193065,53016,01032.33%
192049,5204,80610.75%
191044,714-3,047-6.38%
190047,7615,55113.15%
189042,2103620.87%
188041,8484141.00%
187041,4345,74816.11%
186035,6867,11924.92%
185028,5674,99621.20%
184023,57119,529483.15%
18304,0420.00%

Washtenaw County Population Growth

Population Data via

Washtenaw County Race Data

Race Population Percentage
White268,78973.11%
Black or African American45,81912.46%
Asian32,4168.82%
Two or More Races12,2263.33%
American Indian and Alaska Native1,4150.38%
Native Hawaiian and Other Pacific Islander1820.05%

Washtenaw County Population Pyramid

0k5k10k15k20k25k Male Population0k5k10k15k20k25k Female Population8580757065605550454035302520151050
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990