The Kaczawskie Mountains or Katzbach Mountains (Polish: Góry Kaczawskie; German: Katzbachgebirge) are a mountain range in the Lower Silesian Voivodeship of Poland. It is roughly 30 kilometres long and belongs to the Western Sudetes. Its highest peak is the Skopiec (719 m). To the north of the Kaczawskie Mountains are the Kaczawskie Foothills (Polish: Pogórze Kaczawskie; German: Bober-Katzbach-Vorgebirge).

The ridge, which runs from northwest to southeast at heights between 400 and 700 metres, is a fold mountain range consisting of limestone, slate and dolomite. In the west the Bóbr separates the range from the Jizera Mountains and Jizera Foreland; to the north are the Katzbach Foothills; to the east the Raging Neisse / Nysa Szalona forms the boundary. In the southeast, the Katzbach Mountains merge into the Waldenburg Mountains. To the south, the Landeshut Ridge / Rudawy Janowickie and Jelenia Góra Valley form the transition to the Giant Mountains.

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50°57′47″N 15°50′49″E / 50.963056°N 15.846944°E / 50.963056; 15.846944