Thayer County was formed in 1872 and was named after the General and Governor John Milton Thayer.Area Page: Eastern South Nebraska AreaCounty Seat: Hebron NebraskaLicense Platte Prefix: 32Census 2010: 5,228Cities Towns in the County: Hebron NebraskaCounty Map with Cities: Thayer County MapWebsite - County: Thayer County Nebraska Official Website