according to HD’s web site, there are four plants in the USA.
Ok I see now that there were 2 more factories added to the line-up the last one opening in 2008.According to Wiki:
York, Pennsylvania - Vehicle Operations: Manufacturing site for Touring class, Softail, and custom vehicles.
Tomahawk, Wisconsin - Tomahawk Operations: Facility that makes sidecars, saddlebags, windshields, and more.
Kansas City, Missouri - Vehicle and Powertrain Operations: Manufacturing site of Sportster, VRSC, and other vehicles.
Menomonee Falls, Wisconsin - Pilgrim Road Powertrain Operations plant, two types of tours.