The Tuatapere Branch, including the Orawia Branch, was a branch line railway in Southland, New Zealand. Although the Tuatapere and Orawia Branches look like a single line, operationally they were considered separate lines. The first section opened to Riverton in 1879 and reached Tuatapere three decades later. The extension from Tuatapere to Orawia operated from 1925 until 1970. In 1976 the Tuatapere Branch was truncated to Riverton, and was known as the Riverton Branch until 1978, when it closed beyond Thornbury. The remaining portion of the line is now part of the Wairio Branch.