|⁃ location||Mount Erymanthos|
|Length||28.5 km (17.7 mi)|
|Progression||Peiros→ Ionian Sea|
Parapeiros (Greek: Παραπείρος, also Τυθεύς - Tythefs, Ancient Greek: Τευθέας - Teutheas) is a river in the western part of Achaea, Greece. It is 28.5 km (17.7 mi) long. 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.