Thaisa may refer to:
Thaisa Storchi Bergmann (born 1959), Brazilian astrophysicist Thaisa Erwin (born 1980), Australian equestrian athlete Thaisa Serafini (born 1985), Brazilian squash player Thaísa Daher de Menezes (born 1987), Brazilian volleyball player Thaisa Moreno (born 1998), Thaisa de Moraes Rosa Moreno, Brazilian football midfielder Thaísa Grana Pedretti (born 1999), Brazilian tennis player