| Official Name: | Allerston |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Canada Alberta |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | Alberta |
| Subdivision Type2: | Region |
| Subdivision Name2: | Southern Alberta |
| Subdivision Type3: | Census division |
| Subdivision Name3: | 2 |
| Subdivision Type4: | Municipal district |
| Subdivision Name4: | County of Warner No. 5 |
| Leader Title: | Governing body |
| Leader Name: | Warner County Council |
| Leader Title1: | MP |
| Leader Name1: | Jim Hillyer |
| Leader Title2: | MLA |
| Leader Name2: | Gary Bikman |
| Established Title: | Founded |
| Timezone: | MST |
| Utc Offset: | −7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | −6 |
| Coordinates: | 49.1445°N -111.7642°W |
| Postal Code Type: | Postal code span |
| Postal Code: | List of T Postal Codes of Canada |
| Area Code: | +1-403 |
| Blank Name: | Highways |
| Blank Info: | Highway 501 |
| Blank1 Name: | Railways |
Allerston, formerly Allersville,[1] is an unincorporated community in Alberta, Canada within the County of Warner No. 5. It is located approximately 25km (16miles) east of the Town of Milk River and 18km (11miles) north of the Canada–US border on Township Road 24, 1km (01miles) off Highway 501.
The community has the name of Jacob Allers, a pioneer citizen.[2]
All that remains of Allerston is a Roman Catholic Church and the Allerston Hall with baseball diamonds. The church was built in 1911[1] and opened on July 28, 1912. The church is still in use today. It was moved to a new foundation 20feet to the north. There is a cemetery behind the church. The Allerston Hall is still use for the annual Fall Bazar.[3]
Writing-on-Stone Provincial Park, is one of the largest areas of protected prairie in the Alberta park system, and serves as both a nature preserve and protection for the largest concentration of rock art, created by Plains People. There are over 50 rock art sites, with thousands of figures, as well as numerous archeological sites.