Casadepaga River
General data
- Name: Casadepaga River
- Water system: Fish River (Alaska)
- Water type: River
- Progression: Niukluk River -> Fish River (Alaska) -> Golovnin Bay -> Norton Sound -> Bering Sea -> Pacific Ocean -> Planet Earth
- Climates: Subpolar
- Continents: North America
- Countries: United States of America
Casadepaga River (also Koshotok and Koksuktapaga) (Inupiaq: Qaqsruqtaq) is a waterway in the U.S. state of Alaska, near Nome. It is the largest southern branch of the Niukluk River. It has a length of about 30 miles (48 km) and a general northeasterly course.