High Quality Content by WIKIPEDIA articles! Voltaire is a city in McHenry County, North Dakota in the United States. The population was 51 at the 2000 census. It is part of the Minot Micropolitan Statistical Area. Voltaire was founded in 1901.As of the census of 2000, there were 51 people, 20 households, and 14 families residing in the city. The population density was 125.1 people per square mile (48.0/km²). There were 21 housing units at an average density of 51.5/sq mi (19.8/km²). The racial makeup of the city was 100.00% White.