Knik Arm
General data
- Name: Knik Arm
- Water system: Gulf of Alaska
- Water type: Bay
- Progression: Cook Inlet -> Gulf of Alaska -> Pacific Ocean -> Planet Earth
- Climates: Subpolar
- Continents: North America
- Countries: United States of America
Knik Arm is a waterway into the northwestern part of the Gulf of Alaska. It is one of two narrow branches of Cook Inlet, the other being Turnagain Arm. Knik Glacier empties into the Knik Arm. The Port of Anchorage is located on the arm.