WSA

WSA may refer to:


 * van der Waals surface area
 * War Shipping Administration, part of the US government responsible for building cargo ships in World War II
 * Weapon storage area, a maximum security part of an ammunition depot where nuclear weapons are stored
 * West Allerton railway station, Liverpool, England (station code)
 * Western Sahara Authority
 * Western Soccer Alliance
 * Western Sydney Airport, an international airport currently under construction
 * Wilderness study area
 * Windows Socket API, Microsoft's implementation of Berkeley sockets
 * Windows Subsystem for Android, a compatibility layer for Android apps in Windows 11
 * Women's Squash Association, the governing body for the women's professional squash circuit and the women's world rankings
 * Worker Student Alliance, a division of Students for a Democratic Society, sometimes referred to as SDS-WSA
 * Workers' Solidarity Alliance
 * World Service Authority
 * World Soundtrack Awards
 * World Summit Award
 * WSA Process, Wet gas Sulphuric Acid is a Wet Catalysis Process
 * Web Services Addressing
 * United Nations World Summit Awards