Teshio (天塩郡, Teshio-gun) is a district divided between Rumoi and Sōya Subprefectures, Hokkaido, Japan. At the end of 2009, the district has an estimated population of 13,937 and an area of 2039.11 km², giving a population density of 6.83 persons per square kilometer.

In 2010, the town of Horonobe was transferred from Rumoi Subprefecture to Sōya Subprefecture.