Nuckolls County was formed in 1860 and was named after Stephen F. Nuckolls, an early pioneer in this area. Area Page: Eastern South Nebraska AreaCounty Seat: Nelson NebraskaLicense Platte Prefix: 42Census 2010: 4,500Cities Towns in the County: Nelson NebraskaCounty Map with Cities: Nuckolls County MapWebsite - County: Nuckolls County Nebraska Official Website