Coupeville is a town on Whidbey Island, in Island County, Washington, United States.
It is the county seat of Island County. The population was 1,831 at the 2010 census.
Coupeville is located at 48°13′6″N 122°41′1″W (48.218250, -122.683556).
According to the United States Census Bureau, the town has a total area of 1.23 square miles (3.19 km²), all of it land.
As of the census of 2010, there were 1,831 people, 806 households, and 428 families residing in the town. The population density was 1,488.6 inhabitants per square mile (574.8/km²). There were 933 housing units at an average density of 758.5 per square mile (292.9/km²). The racial makeup of the town was 87.2% White, 1.6% African American, 0.6% Native American, 1.9% Asian, 0.3% Pacific Islander, 4.2% from other races, and 4.3% from two or more races. Hispanic or Latino of any race were 9.0% of the population.
There were 806 households of which 21.1% had children under the age of 18 living with them, 42.8% were married couples living together, 7.3% had a female householder with no husband present, 3.0% had a male householder with no wife present, and 46.9% were non-families. 40.0% of all households were made up of individuals and 19.4% had someone living alone who was 65 years of age or older. The average household size was 2.06 and the average family size was 2.77.
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