Acton is an Census Designated Place in northwestern Yellowstone County, Montana, United States.

[2] 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.

[3] Acton is a small farming community which originated as a stop on the Great Northern Railroad.

[4] Charles T. Robinson served as the original postmaster.

This Yellowstone County, Montana state location article is a stub.