Category: Washington — this specific category here on WikiIndex contains a list of articles (and any sub-categories) of wiki sites about the US state of Washington within the United States of America (USA). It may also include people, places, geography, history, language(s), and / or any other pertinent information. The US postal abbreviation for Washington is WA, and its ISO 3166-2 code is US–WA. Its capital city is Olympia, though its largest city is Seattle. Washington State is situated on the north-west of mainland USA, and borders the Canadian territory of British Columbia.
- For the Capitol and federal district of the USA, see: category: District of Columbia.