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is a city in Richland County, North Dakota in the United States. The population was 91 at the 2000 census. Colfax was founded in 1881. It is part of the Wahpeton, ND–MN Micropolitan Statistical Area.
According to the United States Census Bureau, the city has a total area of 0.9 square miles (2.3 km²), all of it land.