| Pērse | |
| Source1 Location: | Kārdace forest. Sausnēja parish |
| Mouth Location: | Koknese |
| Mouth: | Daugava |
| Mouth Coordinates: | 56.638°N 25.4154°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Latvia, |
| Length: | 50km (30miles) |
| Source1 Elevation: | 122m (400feet) |
| Basin Size: | 325km2 |
The Pērse is a right tributary to the river Daugava in Latvia, flowing through Ērgļi, Pļaviņas and Koknese municipalities. The river crosses roads A6, P79, P80 and the Riga-Krustpils railway line. The 50-km long Pērse begins in Kārdeces forest in Sausnēja parish.