The Working Waterfront Maritime Museum is a Maritime Museum located in Tacoma, Washington, USA. The museum sits on the Thea Foss Waterway. Along with the Discovery Wharf Children's Activity Area, the WWMM is a part of the Foss Waterway Seaport, a 501c3 non-profit organization founded in 1996. In conjunction with the Foss Waterway Development Agency, the Seaport seeks private and public funds to support its mission statement. The Working Waterfront Maritime Museum is dedicated to creating "a permanent education and activity venue on the Tacoma waterfront".