Utanobori (歌登町 Utanobori-chō) was a town located in Esashi District, Sōya, Hokkaidō, Japan.
On March 20, 2006 Utanobori was merged into the town of Esashi.
As of 2004, the town had an estimated population of 2,332 and a density of 3.84 persons per km². The total area was 606.51 km².