| Masinasin | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | CAN AB Warner#Canada Alberta |
| Pushpin Map Caption: | Location in County of Warner##Location in Alberta |
| Coordinates: | 49.1522°N -111.6764°W |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | Alberta |
| Subdivision Type2: | Region |
| Subdivision Name2: | Southern Alberta |
| Subdivision Type3: | Planning region |
| Subdivision Name3: | South Saskatchewan |
| Subdivision Type4: | Municipal district |
| Subdivision Name4: | Warner |
| Established Title2: | Founded |
| Established Date2: | 1890s |
| Leader Title2: | Governing body |
| Leader Name2: | Warner County Council |
| Leader Title3: | MP |
| Leader Name3: | Glen Motz |
| Leader Title4: | MLA |
| Leader Name4: | Grant Hunter |
| Population Density Km2: | auto |
| Timezone: | MST |
| Utc Offset: | −7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | −6 |
| Postal Code Type: | Postal code span |
| Postal Code: | TOK |
| Area Code: | +1-403 |
| Blank Name: | Highways |
| Blank Info: | Highway 500 Highway 501 |
Masinasin is a former community in Alberta, Canada within the County of Warner No. 5. It is located 1km (01miles) off Highway 501 on Range Road 133, approximately 31km (19miles) east of the Town of Milk River and 18km (11miles) north of the Canada–US border and Writing-on-Stone Provincial Park. All that remains of the former community is a small alternative school with baseball diamonds and the overgrown Pioneer Cemetery,[1] approximately 3km (02miles) to the southeast on Highway 500.
Masinasin is a Cree name meaning 'Writing on Stone', referring to figures and writing cut in the sandstone banks of Milk River.
Masinasin experiences a semi-arid, continental climate (Köppen climate classification BSk).[2]
The Milk River Valley School District No. 2024 was formed on August 24, 1909. The Milk River Valley school was a one room schoolhouse that once stood at township 15 - 2 - 13 - W4.[3] Originally named Milk River Valley, the name was changed to Masinasin in 1941, when several area school districts were centralized and moved to Masinasin.