Brentwood
- Country: United States
- State: New York
- Population: 60,664 (2010)
- Latitude: 40° 46.9' N (40.78121°)
- Longitude: 73° 14.8' W (-73.24623°)
- Elevation: 24 m/79 ft. above sea level
- Time zone: America/New_York (UTC -05:00); DST observed (UTC -04:00)
- Alternate names: Brentwood CDP, Modern Times