Central portion of Dakota County courthouse in Dakota City, Nebraska; seen from the south. The Art Deco central section of the courthouse was built in 1940-41; additions have since been built on both the east and west sides. – Ammodramus, Public domain – Wikimedia Commons Dakota County is located in Nebraska. About 20,781 people live here. Between 2010 and 2020, the population grew from 21,006 to 21,582. The area covers about 693.0 square kilometers. The region is divided into 3 Municipalities and 6 Subregions. The region was founded in 1855. The name originates from Dakota people (native American people) Dakota County is county in Nebraska, United States. More information at www.dakotacountyne.org.