Olja is a feminine given name and nickname. It may refer to:
Given name Olja Bećković (born 1964), Serbian journalist, actress and television presenter Olja Ivanjicki (1931–2009), Serbian painter, sculptor and poet Olja Knežević (born 1968), Croatia-based Montenegrin novelist Olja Petrović (politician) (born 1990), Serbian politician Olja Savičević (born 1974), Croatian novelist, poet and playwright
Nickname Olivera Ćirković (born 1969), Serbian writer, painter, former convicted jewel thief and former basketball player and administrator Ognjen Petrović (1948–2000), Serbian football goalkeeper
See also Olga, Olha, Olya, Volha, other similar given names