Hilliard is a city in Franklin County, Ohio, United States. The population was 37,114 at the 2020 census. It is a suburb of Columbus and part of Norwich Township. Hilliard is home to the Early Television Museum (the only one of its kind in United States), the second largest First Responders Park in the United States, and Heritage Rail Trail. Hilliard also has the only flag pole from the World Trade Center that is not in a museum. The flag pole is located in front of the fire department on Northwest Parkway. The Hilliard Historical Society maintains a historical village near the Franklin County Fairgrounds.