Westbury is a neighborhood in the Brays Oaks district of Southwest Houston, Texas, United States. It is located east of Bob White Road, north of U.S. Highway 90 Alternate, and west of South Post Oak Road, adjacent to the Fondren Southwest and Meyerland neighborhoods, just west of the southwest corner of the 610 Loop.

Brays Oaks, formerly known as Fondren Southwest, is an area in Southwest Houston, Texas, United States. The Brays Oaks Management District, also known as the Harris County Improvement District #5, governs the Brays Oaks area as well as other surrounding areas, such as Westbury. The City of Houston also defines the Brays Oaks Super Neighborhood, with separate boundaries.