Iliopoulos (Greek: Ηλιόπουλος) is a Greek surname. Notable people with the surname include:
- Vasileios Iliopoulos (born 1988), Greek tennis player
- Dinos Iliopoulos (1915–2001), actor and film director
- Giannis Iliopoulos (born 1979), basketball player
- John Iliopoulos (born 1940), theoretical physicist
- Marios Iliopoulos (born 1969), heavy metal guitarist
- Panourgias Iliopoulos (1787–1865), soldier of Theodoros Kolokotronis during the Greek War of Independence
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