| Łutownia | |
| Mouth Location: | at Stara Białowieża on the Narewka |
| Mouth Coordinates: | 52.7427°N 23.8167°W |
| Progression: | Narewka→ |
| Subdivision Type1: | Country |
| Length: | 19.19km (11.92miles) |
| Basin Size: | 120.44km2 |
The Łutownia (pronounced as /pl/; Belarusian: Лутоўня), in northeast Poland, is a left-bank tributary of the Narewka River. It was formerly known in Polish as the Łętownia, Lętownia, Łotownia, Łutownica, Latownica, Lutownia, and Szczekotówka River.
The Łutownia flows through the European region known as the Wysoczyzny Podlasko – Bialoruskie (Podlasie-Belarus Plateau) in Poland's Podlasie Province and Belarus' Hrodna Voblast. The river, from its origin to its mouth, flows through the Białowieża Forest.
Villages:
Main tributaries (right bank):