WTA may refer to:

  • War of the Triple Alliance, also known as the Paraguayan War, a war between Paraguay and the allied Argentina, Brazil and Uruguay
  • Washington Trails Association
  • Waskahegan Trail Association, the management board for the Waskahegan Trail
  • Water Transit Authority, former name of the San Francisco Bay Area Water Emergency Transportation Authority
  • Werewolf: The Apocalypse, a role-playing game by White Wolf Publishing
  • Whatcom Transportation Authority, a bus agency in Washington State, USA
  • Wichita Terminal Association, a railroad
  • Wilco (The Album), an album by Wilco
  • Willingness to accept
  • Winner takes all
  • Women's Tennis Association
  • World Trampolining Association, Founded in 1866 following the founding of the Amateur Athletics Association in 1864
  • World Transhumanist Association, former name of Humanity+
  • Ward Traditional Academy, an Elementary School of Arizona