Karasjohka, also known as Kárášjohka in Northern Sami and Kaarasjoki in Kven, is a river located in Finnmark county, Norway. The river spans 161 kilometres (100 miles) in length, flowing through the municipalities of Kautokeino and Karasjok.
The river serves as one of the primary drainage systems for the Finnmarksvidda plateau. It eventually flows into the Tana River, a location well-known for salmon fishing, near the village of Karigasniemi on the border between Norway and Finland.