| Karluk River | |
| Map Size: | 300 |
| Pushpin Map: | USA Alaska |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of the mouth of the Karluk River in Alaska |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Alaska |
| Subdivision Type4: | Borough |
| Subdivision Name4: | Kodiak Island |
| Length: | 24miles[1] |
| Source1: | Karluk Lake |
| Source1 Coordinates: | 57.4417°N -154.1072°W |
| Source1 Elevation: | 388feet[2] |
| Mouth: | Shelikof Strait |
| Mouth Location: | Karluk |
| Mouth Coordinates: | 57.5717°N -154.4622°W[3] |
| Mouth Elevation: | 0feet |
The Karluk River is a stream, 24miles long, on Kodiak Island in the U.S. state of Alaska.[1] It begins at Karluk Lake in the Kodiak National Wildlife Refuge and flows north and then northwest through Karluk Lagoon to the Shelikof Strait at Karluk.[4]
Sportfishing is popular in this river basin, "the largest and most productive" on Kodiak Island.[5] It has significant runs of sockeye salmon, Coho, pink, Chinook, and chum salmon, and steelhead, and Dolly Varden trout are also prevalent.[5] The entire main stem, rated Class I (easy) on the International Scale of River Difficulty, is floatable by raft or kayak.[5]