Arm River No. 252 (2006 Population 240) is a rural municipality in central Saskatchewan, Canada along Highway 11 between Saskatoon and Regina. It is located in Division No. 11. Arm River No. 252 was incorporated as Girvin on December 1, 1909, the name changing to Arm River on June 29, 1912. At the end of 2005, the village of Girvin dissolved, and its population is now counted as a part of Arm River No.