99 (2016 population: 245) is a rural municipality (RM) in the Canadian province of Saskatchewan within Census Division No.

99 incorporated as a rural municipality on December 13, 1909.

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

99 is governed by an elected municipal council and an appointed administrator that meets on the first Tuesday of every month.

[3] The reeve of the RM is Mark Beck while its administrator is Stephen Schury.