WECA may refer to:
West of England Combined Authority Wi-Fi Alliance UDP-N-acetylglucosamine—undecaprenyl-phosphate N-acetylglucosaminephosphotransferase, an enzyme UDP-N-acetylglucosamine—decaprenyl-phosphate N-acetylglucosaminephosphotransferase, an enzyme WECA-LP, a low-power radio station (105.7 FM) licensed to Palm Bay, Florida, United States