Editing Washington County, Minnesota (section)

===2010 census===
The ethnic makeup of the country, according to the [[2010 United States census|2010 census]], was the following:
* 87.77% [[White American|White]]
* 3.60% [[African American|Black]]
* 0.49% [[Native Americans in the United States|Native American]]
* 5.07% [[Asian American|Asian]]
* >0.01% [[Native Hawaiian]] or [[Pacific Islander American|Pacific Islander]]
* 2.10% [[Multiracial American|Two or more races]]
* 0.97% [[Race (United States Census)|Other races]]
* 3.41% [[Hispanic and Latino Americans|Hispanic or Latino]] (of any race)

As of the census of 2010, there were 238,136 people, 87,446 households, and 64,299 families in the county. The population density was {{convert|620|/mi2|/km2}}. There were 87,446 housing units at an average density of {{convert|228|/mi2|/km2}}. 39.4% were of German, 14.4% Irish, 13.0% Norwegian, and 9.9% Swedish ancestry. There were 87,446 households, out of which 38.6% had children under the age of 18 living with them, 60.6% were married couples living together, 9.5% had a female householder with no husband present, and 26.5% were non-families. 21.5% of all households were made up of individuals, and 7.3% had someone living alone who was 65 years of age or older. The average household size was 2.67 and the average family size was 3.14.

The county population contained 23.5% under the age of 18, 6.2% from 18 to 24, 32.90% from 25 to 44, 28.7% from 45 to 64, and 10.3% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 98.02 males. For every 100 females age 18 and over, there were 97.03 males. The median income for a household in the county was $79,735, and the median income for a family was $92,497. The per capita income for the county was $36,786. About 5.2% of the population was below the poverty line.

According to the 2007-2011 [[American Community Survey]], of the county's population 25 years and over, 1.4% had less than 9th grade education, 2.8% held 9th to 12th grade with no diploma, 23.6% had High school graduate or equivalent, 22.2% held Some college with no degree, 27.0% had bachelor's degree, and 13.0% earned Graduate or professional degree.