| Official Name: | Acton, Montana |
| Settlement Type: | Census Designated Place |
| Pushpin Map: | Montana#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Montana |
| Subdivision Type2: | County |
| Subdivision Name2: | Yellowstone |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.62 |
| Area Land Km2: | 0.62 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 0.24 |
| Area Land Sq Mi: | 0.24 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 48 |
| Population Density Km2: | 77.37 |
| Population Density Sq Mi: | 200.00 |
| Timezone: | Mountain (MST) |
| Utc Offset: | -7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | -6 |
| Elevation Ft: | 3806 |
| Coordinates: | 45.9289°N -108.6786°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 59002 |
| Area Code: | 406 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 2804624 |
Acton is an Census Designated Place in northwestern Yellowstone County, Montana, United States. It has a postal ZIP code (59002) and lies along Montana Highway 3 northwest of the city of Billings, the county seat of Yellowstone County.[2]
Acton is a small farming community which originated as a stop on the Great Northern Railroad. The post office was opened in 1910.[3] Charles T. Robinson served as the original postmaster. The post office no longer exists.
According to the Köppen Climate Classification system, Acton has a semi-arid climate, abbreviated "BSk" on climate maps.[4]
The school districts are Broadview Elementary School District and Broadview High School District.[5]