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

[3] Mercer was founded in 1905 along a now-abandoned branch line of the Northern Pacific Railway extending from Carrington to Turtle Lake.

[5] The city of Mercer lies on North Dakota Highway 200 between Underwood and McClusky.

[6] Zion Lutheran Cemetery, Wrought-Iron Cross Site, in or near Mercer, is listed on the National Register of Historic Places.

43.8% of all households were made up of individuals, and 29.2% had someone living alone who was 65 years of age or older.

55.1% of all households were made up of individuals, and 32.7% had someone living alone who was 65 years of age or older.