WTA may refer to:
Organizations 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 Whatcom Transportation Authority, a bus agency in Washington State, USA Wichita Terminal Association, a railroad Wisconsin Towns Association Women's Tennis Association World Transhumanist Association, former name of Humanity+
Other uses Wall teichoic acid, teichoic acids that are covalently bound to peptidoglycan in bacteria Warcop Training Area, a UK Ministry of Defence military training area, Cumbria, North West England Weapon target assignment problem Willingness to accept Winner takes all (disambiguation)