Hastings is a city and county seat of Adams County, Nebraska, United States. The population was 24,907 at the 2010 census. It is known as the town where Kool-Aid was invented by Edwin Perkins in 1927, and celebrates that event with the Kool-Aid Days festival every August. Hastings is also known for Fisher Fountain, and during World War II operated the largest Naval Ammunition Depot in the United States.