Washburn is a city in McLean County, North Dakota, United States. It is the county seat of McLean County. The population was 1,246 at the 2010 census. Washburn was founded in 1882 and became the county seat in 1883. The city's name honors General Cadwallader C. Washburn.
Washburn is home to the North Dakota Lewis and Clark Interpretive Center which focuses on the Expedition's winter with the Mandans and houses a full-scale replication of Fort Mandan and one of the expedition's canoes.
Washburn is located at 47°17′29″N 101°1′40″W (47.291313, -101.027647).
According to the United States Census Bureau, the city has a total area of 1.89 square miles (4.90 km2), of which 1.80 square miles (4.66 km2) is land and 0.09 square miles (0.23 km2) is water.
As of the census of 2010, there were 1,246 people, 551 households, and 369 families living in the city. The population density was 692.2 inhabitants per square mile (267.3/km2). There were 661 housing units at an average density of 367.2 per square mile (141.8/km2). The racial makeup of the city was 98.0% White, 0.1% African American, 0.6% Native American, 0.5% from other races, and 0.9% from two or more races. Hispanic or Latino of any race were 1.1% of the population.