WJA or wja may refer to:
Codes WJA, the ICAO code for WestJet, Alberta, Canada WJA, the IATA code for Woja Airport, Ailinglaplap Atoll, Marshall Islands wja, the ISO 639-3 code for Waja language, eastern Nigeria
Organisations Washington Jesuit Academy, a middle school in Washington, D.C., US Welsh Judo Association, the governing body for the sport of judo in Wales, UK World Jurist Association, an NGO based in the US focused on strengthening the rule of law globally