338 (2016 population: 415) is a rural municipality (RM) in the Canadian province of Saskatchewan within Census Division No.

In the 2021 Census of Population conducted by Statistics Canada, the RM of Lakeside No.

338 is governed by an elected municipal council and an appointed administrator that meets on the second Thursday of every month.

[3] The reeve of the RM is Arnold Boyko while its administrator is Julie Knafelc.

[3] The RM's office is located in Quill Lake.