Shizunai (静内町 -chō) was a town that was located in Shizunai District, Hidaka, Hokkaidō, Japan.
On March 31, 2006 Shizunai was merged with the town of Mitsuishi, from Mitsuishi District, to form the new town of Shinhidaka, in the newly-created Hidaka District.
As of 2004, the town had an estimated population of 22,581 and a density of 28.17 persons per km². The total area was 801.51 km².
It was the most populous town and was the economic center of Hidaka Subprefecture. Nijikken-dōro (二十間道路, lit. road 36 meter in width), the avenue of cherry blossoms, was a major tourist attraction of the town.