The feminine given name Thea, short for Theodora, Theadora, Dorothea, or Althea (also spelled Elithea), may refer to:
Thea, alias for singer-songwriter Cynthia L. Stacey
Thea Andrews, Canadian journalist
Thea Astley, Australian writer
Thea Beckman, Dutch writer
Thea Bowman, American nun
Thea Djordjadze, Georgian artist
Thea Dorn, German writer
Thea E. Smith, American writer
Thea Einöder, German rower
Thea Flaum, American TV producer
Thea Foss, American entrepreneur
Thea Garrett, Maltese singer
Thea Gill, Canadian actress
Thea Gilmore, British singer-songwriter
Thea Gregory, English actress
Thea Halo, American writer
Thea Hochleitner, Austrian alpine skier
Thea Kano, American conductor
Thea Kellner, Romanian fencer
Thea King, British clarinettist
Thea Knutzen, Norwegian politician
Thea Leitner, Austrian writer
Thea Muldoon, New Zealander first lady
Thea Musgrave, Scottish composer
Thea Proctor, Australian artist
Thea Rasche, German pilot
Thea de Roos-van Rooden, Dutch historian and politician
Thea Sharrock, English theatre director
Thea Slatyer, Australian footballer
Thea Stabell, Norwegian actress
Thea Trinidad, American wrestler
Thea Vidale, American comedian and actress
Thea Van Seijen, Dutch singer
Thea von Harbou, German filmmaker and actress
Thea White, American voice actress
