| Old Post No. 43 | |
| Official Name: | Rural Municipality of Old Post No. 43 |
| Settlement Type: | Rural municipality |
| Image Map1: | SK RM 43 Old Post.svg |
| Mapsize1: | 200 |
| Map Caption1: | Location of the RM of Old Post No. 43 in Saskatchewan |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | Saskatchewan |
| Subdivision Type2: | Region |
| Subdivision Type3: | Census division |
| Subdivision Name3: | 3 |
| Subdivision Type4: | division |
| Subdivision Name4: | 2 |
| Subdivision Type5: | Federal riding |
| Subdivision Name5: | Cypress Hills—Grasslands |
| Subdivision Type6: | Provincial riding |
| Subdivision Name6: | Wood River |
| Government Footnotes: | [1] |
| Leader Title: | Reeve |
| Leader Name: | vacant |
| Leader Title1: | Governing body |
| Leader Name1: | RM of Old Post No. 43 Council |
| Leader Title2: | Administrator |
| Leader Name2: | Vickie Greffard |
| Leader Title3: | Office location |
| Leader Name3: | Wood Mountain |
| Established Title: | Formed |
| Established Title2: | Formed |
| Established Date2: | January 1, 1967 |
| Established Title3: | Name change |
| Established Title4: | Name change |
| Established Title5: | Amalgamated |
| Area Footnotes: | (2016) |
| Area Land Km2: | 1757 |
| Population As Of: | 2016 |
| Population Total: | 377 |
| Population Density Km2: | 0.2 |
| Timezone: | CST |
| Timezone Dst: | CST |
| Coordinates: | 49.326°N -106.268°W[2] |
| Postal Code Type: | Postal code |
| Postal Code: | S0H 4L0 |
| Area Code: | 306 and 639 |
| Blank Name: | Highway(s) |
| Blank1 Name: | Railway(s) |
| Blank2 Name: | Waterway(s) |
The Rural Municipality of Old Post No. 43 (2016 population:) is a rural municipality (RM) in the Canadian province of Saskatchewan within Census Division No. 3 and Division No. 2. It is located in the southern portion of the province adjacent to the United States border, neighbouring Valley County and Daniels County in Montana.
The RM of Old Post No. 43 incorporated as a rural municipality on January 1, 1967.[3]
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 Old Post No. 43 had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of 1757.5km2, it had a population density of in 2021.[5]
In the 2016 Census of Population, the RM of Old Post No. 43 recorded a population of living in of its total private dwellings, a change from its 2011 population of . With a land area of 1757km2, it had a population density of in 2016.[6]
The RM of Old Post No. 43 is governed by an elected municipal council and an appointed administrator that meets on the second Thursday of every month.[1] The reeve position is vacant while the RM's administrator is Vickie Greffard.[1] The RM's office is located in Wood Mountain.[1]
The RM is a part owner of the Fife Lake Railway.[13]