Columbus is a city in east central Nebraska, United States. Its population was 22,111 at the 2010 census. It is the county seat of Platte County.The Andrew Jackson Higgins National Memorial in Pawnee Park features a life-sized replica of a Higgins boat with bronze statues of soldiers exiting into the sand. The memorial includes sand samples from 58 beaches of historic significance D-Day beaches of World War II, and beaches in Korea and Vietnam.The Platte County Agricultural Society hosts a number of events at Agricultural Park. The Platte County Fair is held there annually. Live thoroughbred horse racing takes place at the park every year from late July through mid-September races from other tracks are simulcast throughout the year.