There are fifty-three counties in the state of North Dakota. Pembina County was created by the 1866-1867 Dakota territorial legislature, and was organized on August 12, 1867. The city of Pembina, the oldest European-American settlement in the state, was the county seat from 1867 to 1911. The seat was relocated to Cavalier.
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Created by the 1872-73 territorial
legislature and named for the military post of Fort Ransom, 1867-72, which was
located within its boundaries. The fort itself named for Brig. Gen Thomas Edward
Greenfield Ransom (1834-1864), a Union Army officer from Illinois who died
during the Civil War. Government organized: April 4, 1881. County Seat: Lisbon,
Geography: Land and Water
As reported by the Census Bureau, the county has a total area of 864 square miles (2,240 km2), of which 862 square miles (2,230 km2) is
land and 1.4 square miles (3.6 km2) (0.2%) is water.