Bunsui (分水町 Bunsui-machi) was a town located in Nishikanbara District, Niigata, Japan.
As of April 1, 2005, the town had an estimated population of 15,130. The total area was 39.61 km².
On March 20, 2006 Bunsui, along with the town of Yoshida, also from Nishikanbara District, was merged into the city of Tsubame.