Turtle Lake is a city in McLean County, North Dakota, United States.

There were 340 housing units at an average density of 666.7 per square mile (257.4/km2).

39.6% of all households were made up of individuals, and 24.1% had someone living alone who was 65 years of age or older.

There were 329 housing units at an average density of 654.7 per square mile (252.8/km2).

The racial makeup of the city was 98.79% White, 0.86% Native American, 0.17% Asian, and 0.17% from two or more races.

38.3% of all households were made up of individuals, and 25.2% had someone living alone who was 65 years of age or older.