Hayes is a suburban area of southeast London, England and part of the London Borough of Bromley. It is located 11 miles (18 km) south-east of Charing Cross, to the north of Keston and Coney Hall, west of Bromley Common, south of Bromley town centre, and east of West Wickham. An ancient parish in the county of Kent, Hayes was within the Orpington Urban District that became part of Greater London in 1965.

The Mid-Kent line is a British railway line running from Courthill Loop North junction to Hayes railway station in the London Borough of Bromley. Despite its name, none of the line is in the present-day county of Kent.