Tomasa is a Spanish female name. It may refer to:
Art & media Tomasa Diego, lead character in Noh Matta Wat! Tomasa Tequiero, Venezuelan soap opera "", also known as "Bilongo", famous guaracha by Guillermo Rodríguez Fiffe
People Roxana Tomasa Díaz Sánchez (b. 1981), Cuban athlete Tomasa Manalo, wife of Christian sect leader Felix Manalo María Tomasa Palafox, Marquise of Villafranca (1780–1835), Spanish aristocrat Tomasa Vives (b. 1959), Mexican politician
See also Tomás (given name), masculine form of Tomasa Thomas (name)