Columbiana is a city in northern Columbiana and southern Mahoning counties in the U.S. state of Ohio. The population was 6,559 at the 2020 census. It is part of the Salem micropolitan area and the Youngstown–Warren metropolitan area. The city hosts the annual Shaker Woods Arts& Crafts Festival, which brings national attention to the city in the summer and fall seasons. The childhood home of notable inventor and businessman Harvey S. Firestone, Columbiana is home to the 1930s-themed Firestone Farms shopping and business park.