| Official Name: | Square Butte, Montana |
| Pushpin Map: | Montana#USA |
| Pushpin Label: | Square Butte |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Montana |
| Subdivision Type2: | County |
| Subdivision Name2: | Chouteau |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.71 |
| Area Land Km2: | 0.71 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 0.28 |
| Area Land Sq Mi: | 0.28 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 27 |
| Population Density Km2: | 37.87 |
| Population Density Sq Mi: | 98.18 |
| Timezone: | Mountain (MST) |
| Utc Offset: | -7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | -6 |
| Elevation Ft: | 3140 |
| Coordinates: | 47.515°N -110.1983°W |
| Area Code: | 406 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 777101 |
Square Butte is an unincorporated community in Chouteau County, Montana, United States, named for the unique rock formation of the same name slightly southwest of the town. Square Butte is located along Montana Highway 80, 6.8miles south-southeast of Geraldine.
The Square Butte Jail, Square Butte School, and West Quincy Granite Quarry, all of which are listed on the National Register of Historic Places, are located in Square Butte.