Grant County courthouse in Hyannis, Nebraska; seen from the northeast. The date 1957 appears beside the Hereford depicted on the courthouse's north wall. – Ammodramus, Public domain – Wikimedia Commons Grant County is located in Nebraska. About 611 people live here (as of 2020). Between 2010 and 2020, the population declined from 614 to 611. The area covers about 2,029.0 square kilometers. The region is divided into 1 Municipalities. The region was founded in 1884. The name originates from Ulysses S. Grant (president of the United States from 1869 to 1877) Grant County is county in Nebraska, United States. More information at grantcountyne.gov.