American Apparel is located at 2174 Union St. San Francisco, CA 94123. Call Us 415-440-3220. Clothing Stores, Clothing Store, flea market. Made in Downtown L.A. Vertically Integrated Manufacturing.  American Apparel is a vertically integrated manufacturer, distributor and retailer, based in downtown Los Angeles, California. We currently employ approximately 10,000 people globally (about 5,000 in LA), and operate more than 285 retail stores in 20 countries. We're Open Sunday 10:00 am - 8:00 pm, Monday to Thursday 11:00am - 8:00pm, Friday & Saturday 10:00 am - 9:00 pm.. Accepting cash and all major credit cards.