Westbury is a parliamentary constituency represented in the House of Commons of the Parliament of the United Kingdom. Like all such constituencies, it elects one Member of Parliament (MP) by the first past the post system of election.

Westbury plc is a British housebuilding company based in Cheltenham, Gloucestershire. It is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.

Westbury is a station on the Long Island Rail Road's Main Line. All trains for the Port Jefferson Branch and Ronkonkoma Branch run through it, though only some trains on the Port Jefferson branch stop (and none on the Ronkonoma Branch do). It is located at Union and Post Avenues in Westbury, New York.