Buchans Junction is a local service district and designated place in the Canadian province of Newfoundland and Labrador in the central part of the island of Newfoundland.
The community is on a site first known as "Four Mile Siding" on the railway which was constructed in 1900 to connect the community of Millertown to the Newfoundland Railway at Millertown Junction.
The site itself became a rail junction in 1927 when Asarco subsidiary, the Buchans Mining Company, completed a rail link from the newly formed mining town of Buchans.
The town is located approximately 42 kilometres southwest of the Trans-Canada Highway on Route 370.
Clyde Wells, former Premier of Newfoundland, was born in Buchans Junction in 1937.