Hastings is a city and the county seat of Adams County, Nebraska, United States. The population was 25,152 at the 2020 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 , and during World War II operated the largest Naval Ammunition Depot in the United States.