Viking is a city in Marshall County, Minnesota, United States. The population was 104 at the 2010 census.
According to the United States Census Bureau, the city has a total area of 0.5 square miles (1.3 km²), all of it land.
As of the census of 2000, there were 92 people, 39 households, and 26 families residing in the city. The population density was 180.3 people per square mile (69.6/km²). There were 44 housing units at an average density of 86.2 per square mile (33.3/km²). The racial makeup of the city was 100.00% White. Hispanic or Latino of any race were 1.09% of the population.