| Bystrzyca Łomnicka | |
| Mouth Location: | Eastern Neisse |
| Mouth Coordinates: | 50.2955°N 16.6517°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Poland |
| Length: | 25km (16miles) |
Bystrzyca Łomnicka (German: Kressen Bach Weistritz, Weistritz, Hungarian: Lomnici-Beszterce[1]) is a river in south-western Poland. It is a left tributary of the Nysa Kłodzka (Eastern Neisse) and is about 25.5 km long.
Its sources are located in the northern Bystrzyckie Mountains. It enters Nysa Kłodzka in Bystrzyca Kłodzka.