| Mamonovka | |
| Mouth Location: | Vistula Lagoon |
| Mouth Coordinates: | 54.4833°N 19.8669°W |
| Subdivision Type1: | Country |
The Mamonovka or Banovka (ru|Мамоновка, pl|Banówka, de|Bahnau) is a river between Russia (Kaliningrad Oblast) and Poland (Warmian-Masurian Voivodship). It flows into the Vistula Lagoon. It is 51 km long and has a 311 km2 drainage basin.
The Ignatievka River and the Vitushka River are tributaries of the Mamonovka.
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