Wasa may refer to any of the following:
- Wasa Lake, a place in British Columbia, Canada
- Wasabröd, a brandname used by the Swedish company AB Wasabröd
- IK Wasa, a big Swedish club
- Vasa (ship), 17th century Swedish warship, formerly spelled Wasa
- SS Wasa (1907) a Swedish cargo ship launched in 1907, sold to Norway in 1925 and renamed Henry
- Vaasa or Vasa, a town in Finland with a large Swedish-speaking minority, formerly spelled Wasa
- Wasa Line, a former Finnish shipping company
- Legion Wasa, a Swedish political party
- Wasa 30, a Swedish sailboat
- Wasa Amenfi West District, a district in the Western Region of Ghana
- Wasa language, a variety of the Akan languages of Ghana and eastern Côte d'Ivoire
- Wasa (Tanzanian ward), a Tanzanian ward in Iringa Rural district
- Wasa, Cameroon, a town in Extrême-Nord region
WASA may refer to:
- District of Columbia Water and Sewer Authority
- Water and Sewerage Authority of Trinidad and Tobago
- Water and Sanitation Agency of Pakistan
- Western Australia Softball Association