| Official Name: | Sweetgrass, Montana |
| Settlement Type: | Census-Designated Place |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Montana |
| Subdivision Type2: | County |
| Subdivision Name2: | Toole |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.25 |
| Area Land Km2: | 1.25 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 0.48 |
| Area Land Sq Mi: | 0.48 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 65 |
| Population Density Km2: | 51.94 |
| Population Density Sq Mi: | 134.58 |
| Blank Name: | FIPS code |
| Blank Info: | 30-73075 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 777367 |
Sweet Grass (also Sweetgrass) is a census-designated place and unincorporated community in Toole County, Montana, United States, on the Canada–US border. It is the northern terminus of Interstate 15, an important route connecting western Canada, the western United States, and Mexico. The population was 65 according to the 2020 census.[2]
In 2004, a joint border facility opened at the Sweetgrass port of entry and Coutts, Alberta, housing both Canadian and American federal authorities.[3]
Fire service is provided through the volunteer fire department in Coutts.[4]
Sweet Grass has a semi-arid climate (Köppen BSk) that closely borders a humid continental climate (Köppen Dwb).