Westbury may refer to:

• Westbury, Buckinghamshire
• Westbury, Shropshire
• Westbury, Wiltshire
• Westbury-on-Severn, Gloucestershire
• Westbury-on-Trym, Bristol
• Westbury-sub-Mendip, Somerset

• Westbury, Connecticut, a town in Litchfield County
• Westbury, New York, a village in Nassau County, New York on Long Island
  • Westbury station (LIRR), a station on the Long Island Rail Road's Main Line
• Westbury, Cayuga County, New York, a hamlet on the border of Cayuga and Wayne counties in New York
• Westbury, Houston, a neighborhood in Houston, Texas

• Westbury, Tasmania, Australia
• Westbury, Quebec, Canada
• Westbury, suburb of Limerick, Ireland
• Westbury, Johannesburg, suburb of Johannesburg, South Africa

• Westbury (brand), a brand of clothing retailer C&A
• Westbury (surname), including a list of people with the name
• Westbury (housebuilder), British housebuilding company
• Westbury (UK Parliament constituency), former constituency in Wiltshire
• Westbury, model of guitar made by Univox

• Gwespyr, a village in Wales with the same etymology
• Baron Westbury, a title in the Peerage of the United Kingdom
• Westbury High School (disambiguation), several schools
• Westbury Park (disambiguation), several places
• Westbury Square (Houston)