Utashinai (歌志内市, Utashinai-shi) is a city located in Sorachi Subprefecture, Hokkaido, Japan.

Efforts to transform Utashinai from a gritty coal mining town to an alpine tourist destination have met with mixed success.

A medium-sized ski hill, Kamoidake, attracts a decent crowd of locals and hosts frequent ski meets, while a hot spring resort called Tyrol, after the Austrian region, is known throughout Hokkaido for the quality of its water.

The local high school closed in 2007, with students now traveling to Sunagawa, Akabira or Takikawa for their secondary education.

The name is derived from the Ainu ota-us-nay (オタウㇱナイ) meaning "River connected to a sandy beach".