| Usnarka | |
| Mouth Location: | Svislach |
| Mouth Coordinates: | 53.3185°N 23.8606°W |
| Subdivision Type1: | Country |
Usnarka (Belarusian: Уснарка - Usnarka) is a river of Poland and Belarus, a tributary of the Svislach. Its source is near the village Harkawicze in eastern Poland. It crosses the border with Belarus, and flows into the Svislach near the village Makarawtsy, Byerastavitsa District.