Westerville
- Country: United States
- State: Ohio
- Population: 38,985 (2016)
- Latitude: 40° 7.6' N (40.12617°)
- Longitude: 82° 55.7' W (-82.92907°)
- Elevation: 265 m/869 ft. above sea level
- Time zone: America/New_York (UTC -05:00); DST observed (UTC -04:00)
- Alternate names: Westervelt