Penelope Delta (Greek: ???e??p? ???ta; 1874, Alexandria, Khedivate of Egypt – 2 May 1941, Athens) was a Greek author of teenage literature.
Practically the first Greek writer of books for children, her historical novels have been widely read and influenced Greek popular perceptions on national identity and history.
Through her long-time association with Ion Dragoumis, Delta was thrust in the middle of the turbulent early 20th-century Greek politics, from the Macedonian Struggle to the National Schism.
She committed suicide on the day German troops entered Athens in World War II.