Harley-Davidson Motorcycle company harley-davidson.com Harley-Davidson, Inc., or Harley, is an American motorcycle manufacturer, founded in Milwaukee, Founded: 1903, Milwaukee, Wisconsin, United States Headquarters: Milwaukee, Wisconsin, United States Customer service: +1 800-258-2464 Founders: William A. Davidson, William S. Harley, Walter Davidson, Arthur Davidson Parent organizations: Harley-Davidson Motor Company Group, Inc, Harley Davidson Motor Co Group LLC