- Olympia is the capital city of the state of Washington in the United States. It is located in the western part of the state, along the southern end of the Puget Sound. Olympia is known for its natural beauty, with numerous parks and green spaces, as well as its vibrant arts and cultural scene. The city is also home to several government offices and agencies, including the Washington State Capitol. With a population of around 54,000, Olympia is a smaller city compared to other major cities in the region, such as Seattle, but it offers a unique blend of historical charm and modern amenities.