| Płonka | |
| Mouth Location: | Wkra |
| Mouth Coordinates: | 52.6584°N 20.5044°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Poland |
Płonka is a river in the centre of Poland, right-bank tributary of Wkra. The total length of the river amounts to 42.6 km. Source of Płonka is located in the vicinity of the village of Staroźreby, mouth near the village of Kołoząb.