Glennallen
- Country: United States
- State: Alaska
- Population: 483 (2010)
- Latitude: 62° 6.6' N (62.10917°)
- Longitude: 145° 32.8' W (-145.54639°)
- Elevation: 420 m/1,379 ft. above sea level
- Time zone: America/Anchorage (UTC -09:00); DST observed (UTC -08:00)
- Alternate names: Glennallen CDP, Glen Allen, Glenallen, Glenn-Allen, Port Chilkoot