Cedar County Courthouse in Hartington, Nebraska; seen from the southwest. The courthouse was built in 1891; the Romanesque Revival building is listed in the National Register of Historic Places. – Ammodramus, Public domain – Wikimedia Commons Cedar County is located in Nebraska. About 8,380 people live here (as of 2020). Between 2010 and 2020, the population declined from 8,852 to 8,380. The area covers about 1,932.0 square kilometers. The region is divided into 5 Municipalities and 19 Subregions. The region was founded in 1855. The name originates from Juniperus virginiana (species of plant) Cedar County is county in Nebraska, United States. More information at www.co.cedar.ne.us.