山北町为新潟县最北端面向日本海的一町。已于2008年4月1日与村上市、荒川町、神林村、朝日村合并为村上市。

• 山：新保岳、日本国
• 河川：大川、胜木川
• 湖沼：

相邻的自治体

• 新潟县
  • 村上市
  • 岩船郡：朝日村
• 山形县
  • 鹤冈市

Sanpoku(山北町,Sampoku-machi) was a town located in Iwafune District, Niigata Prefecture, Japan.

As of 2005, the town had an estimated population of about 7,243 and a density of 25.95 persons per km². The total area was 283.91 km².

On April 1, 2008, Sanpoku, along with the town of Arakawa, and the villages of Asahi and Kamihayashi (all from Iwafune District), was merged into the expanded city of Murakami.