Siega is a surname. Notable people with the surname include:
Jorge Siega (born 1947), Brazilian footballer Marcos Siega (born 1969) American film, television, commercial and music video director Maurizio Siega (born 1954), Italian long jumper and triple jumper Nicholas Siega (born 1991), Italian professional football player
See also Anna Maria Siega-Riz, American nutritionist Siegas, New Brunswick