Tumblong is a village community in the central east part of the Riverina and situated about 18 kilometres (11 mi) south east from Mundarlo and 25 kilometres (16 mi) northwest of Adelong. It was known as Adelong Crossing or Adelong Crossing Place until 1913. At the 2011 census, Tumblong and the surrounding area had a population of 338.

The Tumut and Kunama railway lines are disused railway lines in the south of New South Wales, Australia. The Tumut line was a 104 kilometres (65 mi) long branch of the Main South line, branching southwards from it at Cootamundra and heading to the town of Tumut. The line served the towns of Tumut and Gundagai, where the line crosses the Murrumbidgee River with a large iron girder bridge and wooden viaduct. Villages on the line included Brawlin, Muttama, Coolac and Tumblong.