Kewanee
- Country: United States
- State: Illinois
- Population: 12,458 (2016)
- Latitude: 41° 14.7' N (41.24559°)
- Longitude: 89° 55.5' W (-89.92483°)
- Elevation: 259 m/849 ft. above sea level
- Time zone: America/Chicago (UTC -06:00); DST observed (UTC -05:00)