397 (2021 population: 485) is a rural municipality (RM) in the Canadian province of Saskatchewan within Census Division No.

[2] In 1924, the RM named a new Canadian Pacific Railway siding "Archerwill" using a syllabic abbreviation of councillors Archie Campbell and Ervie Hanson, and secretary-treasurer William Pierce.

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

397 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 Wayne Black while its administrator is Glenda Smith.