Lewistown Heights is an unincorporated area and census-designated place (CDP) in Fergus County, Montana, United States.

According to the United States Census Bureau, the CDP has a total area of 2.4 square miles (6.1 km2), all land.

[3] As of the census[5] of 2000, there were 365 people, 138 households, and 93 families residing in the CDP.

There were 149 housing units at an average density of 63.5 per square mile (24.5/km2).

18.8% of all households were made up of individuals, and 8.7% had someone living alone who was 65 years of age or older.