| Parapeiros | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Greece |
| Subdivision Type2: | Region |
| Subdivision Name2: | Achaea |
| Length: | 28.5km (17.7miles) |
| Mouth Location: | Peiros |
| Mouth Coordinates: | 38.1261°N 21.6417°W |
| Source1 Location: | Mount Erymanthos |
The Parapeiros (Greek, Modern (1453-);: Παραπείρος, also Τυθεύς - Tythefs, Greek, Ancient (to 1453);: Τευθέας - Teutheas[1]) is a river in the western part of Achaea, Greece. It is 28.5km (17.7miles) long.[2] The Parapeiros begins in the western part of the Erymanthos mountains close to Alepochori. It passes through the municipal units of Tritaia and Farres. It empties into the river Peiros near the village Agios Stefanos.