Brookside
- Country: United States
- State: Delaware
- Population: 14,353 (2010)
- Latitude: 39° 40' N (39.66706°)
- Longitude: 75° 43.6' W (-75.72688°)
- Elevation: 23 m/76 ft. above sea level
- Time zone: America/New_York (UTC -05:00); DST observed (UTC -04:00)
- Alternate names: Brookside CDP, Brookside Park