Kings Highway is an interstate highway located within the Australian Capital Territory and New South Wales, Australia. The highway connects Canberra with Batemans Bay on the South Coast. It is designated route B52.

West to east, it starts at the interchange with Monaro Highway, Canberra Avenue and Ipswich Street on the northern border of Symonston in the Australian Capital Territory and continues in an easterly direction along Canberra Avenue, crosses over the border into New South Wales near Queanbeyan, passes through Queanbeyan itself, Carwoola, briefly crosses back into the Kowen district of ACT and then back into NSW heading south-east to Batemans Bay via Bungendore, Braidwood and Nelligen.

Kings Highway links Monaro Highway in Canberra to Princes Highway in Batemans Bay, and provides access for residents of Canberra to the NSW South Coast and its beaches. The highway is often busy on weekends, especially during summer. The highway also experiences a high number of car crashes, on occasions averaging around one every three days, costing the local community around the highway several million dollars a year.

The landscape is generally sheep country. The highway travels from the Southern Tablelands to the South Coast via Clyde Mountain.

A small rock cave at "Pooh Bear's Corner" can be found near the top of the Clyde Mountain Pass. This was the location of a munitions store during the Second World War, that could be detonated to stop passage from the coast to the national capital inland.

Dozens of soft toys are placed in the eucalyptus trees along the stretch of road that connects Queanbeyan and Bungendore.

The road through the Clyde Mountain area was surveyed by Thomas Mitchell in 1855.

A punt service across the Clyde River opened in 1895 and continued until the Nelligen Bridge opened on 12 December 1964. A replacement bridge built by Seymour Whyte opened in February 2023 with the original demolished.