| Agios Stefanos | |
| Name Local: | Άγιος Στέφανος |
| Type: | community |
| Coordinates: | 38.1°N 59°W |
| Elevation: | 81 |
| Periph: | West Greece |
| Periphunit: | Achaea |
| Municipality: | West Achaea |
| Municunit: | Olenia |
| Population As Of: | 2021 |
| Pop Community: | 813 |
| Postal Code: | 252 00 |
| Area Code: | 26240 |
| Licence: | AX |
Agios Stefanos (Greek, Modern (1453-);: Άγιος Στέφανος meaning Saint Stephen) is a village and a community in the municipality West Achaea, Greece. It is located on both sides of the river Tytheus, 17 km southwest of Patras. The community includes the villages Palaia Peristera and Fylakes. Agios Stefanos is part of the municipal unit of Olenia.