| Excelsior No. 166 | |
| Official Name: | Rural Municipality of Excelsior No. 166 |
| Settlement Type: | Rural municipality |
| Other Name: | Waldeck No. 166 (1909–1916) |
| Image Map1: | SK RM 166 Excelsior.svg |
| Mapsize1: | 200 |
| Map Caption1: | Location of the RM of Excelsior No. 166 in Saskatchewan |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | Saskatchewan |
| Subdivision Type2: | Region |
| Subdivision Type3: | Census division |
| Subdivision Name3: | 7 |
| Subdivision Type4: | division |
| Subdivision Name4: | 3 |
| Subdivision Type5: | Federal riding |
| Subdivision Type6: | Provincial riding |
| Government Footnotes: | [1] |
| Leader Title: | Reeve |
| Leader Name: | Harold Martens |
| Leader Title1: | Governing body |
| Leader Name1: | RM of Excelsior No. 166 Council |
| Leader Title2: | Administrator |
| Leader Name2: | Dianne Hahn |
| Leader Title3: | Office location |
| Leader Name3: | Rush Lake |
| Established Title: | Formed |
| Established Title2: | Formed |
| Established Date2: | December 13, 1909 |
| Established Title3: | Name change |
| Established Date3: | March 1, 1916 (from RM of Waldeck No. 166) |
| Established Title4: | Name change |
| Established Title5: | Amalgamated |
| Area Footnotes: | (2016) |
| Area Land Km2: | 1198.35 |
| Population As Of: | 2016 |
| Population Total: | 806 |
| Population Density Km2: | 0.7 |
| Timezone: | CST |
| Timezone Dst: | CST |
| Coordinates: | 50.635°N -107.494°W[2] |
| Postal Code Type: | Postal code |
| Area Code: | 306 and 639 |
| Blank Name: | Highway(s) |
| Blank1 Name: | Railway(s) |
| Blank2 Name: | Waterway(s) |
The Rural Municipality of Excelsior No. 166 (2016 population:) is a rural municipality (RM) in the Canadian province of Saskatchewan within Census Division No. 7 and Division No. 3.
The RM of Waldeck No. 166 was originally incorporated as a rural municipality on December 13, 1909.[3] Its name was changed to the RM of Excelsior No. 166 on March 1, 1916.[4]
The following urban municipalities are surrounded by the RM.
The following unincorporated communities are within the RM.
In the 2021 Census of Population conducted by Statistics Canada, the RM of Excelsior No. 166 had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of 1196.48km2, it had a population density of in 2021.[5]
In the 2016 Census of Population, the RM of Excelsior No. 166 recorded a population of living in of its total private dwellings, a change from its 2011 population of . With a land area of 1198.35km2, it had a population density of in 2016.[6]
The RM of Excelsior No. 166 is governed by an elected municipal council and an appointed administrator that meets on the second Wednesday of every month.[1] The reeve of the RM is Harold Martens while its administrator is Dianne Hahn.[1] The RM's office is located in Rush Lake.[1]