Rader Creek is a census-designated place (CDP) in Jefferson County, Montana, United States.

An unincorporated place named Nineteen Mile is along Montana Highway 2 in the western part of the CDP, and Cactus Junction, at the intersection of MT 2 and MT 41, is at the eastern border of the CDP.

According to the U.S. Census Bureau, the Rader Creek CDP has an area of 20.3 square miles (52.5 km2), all land.

Rader Creek, the community's namesake, flows out of mountains to the northwest near the Continental Divide, joining Little Pipestone Creek in the east part of the CDP.

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