The capital of Washington State is Olympia, which has seven letters. The capital of Iowa is Des Moines, which has four letters. Olympia is the state capital of Washington and is located in the Puget Sound region of the Pacific Northwest. It is the home of the state government and the site of the state capitol building. Des Moines is the capital of Iowa and is located in the center of the state. It is the most populous city in the state and is home to the Iowa State Capitol.