[1] The county seat is Waterville,[2] while its largest settlement is East Wenatchee.

Douglas County is part of the Wenatchee, WA Metropolitan Statistical Area.

[10] In terms of ancestry, 20.2% were German, 11.2% were English, 9.4% were Irish, 6.0% were Norwegian, and 5.0% were American.

18.0% were of German, 10.0% English, 9.3% United States or American and 7.8% Irish ancestry.

20.00% of all households were made up of individuals, and 7.80% had someone living alone who was 65 years of age or older.

Federally, Douglas County is represented primarily by Dan Newhouse (R) of the 4th while parts of East Wenatchee have been siphoned off into the 8th, represented by Democrat Kim Schrier.

It is one of the most strongly Republican counties in the state in presidential elections, and has not voted for a Democratic candidate since 1964, in Lyndon B. Johnson's rout of Barry Goldwater.