The Pregolya or Pregola (Russian: Прего́ля; German: Pregel; Lithuanian: Prieglius; Polish: Pregoła) is a river that flows to the Baltic Sea through Vistula Lagoon. It is 123 km, 292 km, if you are including the Angrapa. The drainage basin has an area of 15,500 km² and the average river flow is 90 m³/s. It flows through the settlments of Chernyakhovsk, Znamensk, Gvardeysk and Kaliningrad.

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