Broken Bow is a city in Custer County, Nebraska, United States. The population was 3,559 at the 2010 census. It is the county seat of Cus…Broken Bow is a city in Custer County, Nebraska, United States. The population was 3,559 at the 2010 census. It is the county seat of Custer County. Broken Bow was platted in 1882. Its name, likely suggested by a settler who found a broken bow in a field at the site of a former Native American camping ground, was submitted by homesteader Wilson Hewitt to the U.S. Post Office Department. The railroad was built through Broken Bow in 1884, and the town was incorporated as a village that same year. Broken Bow was incorporated as a city of the second class in 1888.