Willmar is a city in and the county seat of Kandiyohi County, Minnesota, United States. The population was 19,610 at the 2010 census. Willmar has been assigned ZIP code 56201 by the United States Postal Service. U.S. Routes 12 and 71 and Minnesota State Highways 23 and 40 are four of the main routes in the city. According to the United States Census Bureau, the city has a total area of 13.6 square miles , of which, 11.8 square miles of it is land and 1.8 square miles of it is water. The total area is 12.94% water. The 45° latitude line passes just south of Willmar, placing it just... halfway between the equator and the North Pole. As of the census of 2000, there were 18,351 people, 7,302 households, and 4,461 families residing in the city. The population density was 1,549.9 people per square mile . There were 7,789 housing units at an average density of 657.8 per square mile . The racial makeup of the city was 88.12% White, 0.90% African American, 0.46% Native American, 0.53% Asian, 0.11% Pacific Islander, 8.52% from other races, and 1.36% from two or more races. Hispanic or Latino of any race were 15.86% of the population.
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| County: | Kandiyohi County |
| State: | Minnesota |
| Country: | United States of America |
| Population: | 17,907 |
| Area: | 13.6 sq. mi. |
| Time zone: | Central Time zone |
| Also known as: | Willmar, Minnesota, Kandiyohi County / Willmar city |