Custer County was formed in 1877 and was named after General George Armstrong Custer, who was killed at the Battle of Little Bighorn. Area Page: Central North Nebraska AreaCounty Seat: Broken Bow NebraskaLicense Platte Prefix: 4Census 2010: 10,939Cities Towns in the County: Broken Bow NebraskaCounty Map with Cities: Custer County MapWebsite - County: Custer County Nebraska Official WebsiteWebsite - County Fair: Custer County Nebraska County Fair