Whitewater is a census-designated place and unincorporated community in Phillips County, Montana, United States. As of the 2020 census, Whitewater had a population of 75. Whitewater has a post office with ZIP code 59544.
In 1927, the town moved about 7 miles west to be on the new Great Northern Railway branch line.
According to the Köppen Climate Classification system, Whitewater has a semi-arid climate, abbreviated "BSk" on climate maps.
Whitewater School District educates students from kindergarten through 12th grade. Whitewater High School's team name is the Penguins.