Helena Valley Southeast is a census-designated place (CDP) in Lewis and Clark County, Montana, United States.

Helena Valley Southeast is located in southern Lewis and Clark County.

Canyon Ferry Road is the main east-west street through the community.

Downtown Helena is approximately 7 miles (11 km) southwest of the center of the CDP.

16.6% of all households were made up of individuals, and 4.1% had someone living alone who was 65 years of age or older.