Horley is a town in the borough of Reigate and Banstead in Surrey, England, south of the towns of Reigate and Redhill. The county border with West Sussex is to the south with Crawley and Gatwick Airport close to the town.

Reigate and Banstead is a local government district with borough status in Surrey, England. Its council is based in Reigate and the borough also includes the towns of Banstead, Horley and Redhill. Parts of the borough are within the Surrey Hills, a designated Area of Outstanding Natural Beauty. Northern parts of the borough, including Banstead, lie inside the M25 motorway which encircles London.