This article is about the ancient Italian town. For the National Off-Road Bicycle Association in the United States, see NORBA. For the Roman colony in Lusitania, see Alcántara.

USA Cycling or USAC, based in Colorado Springs, Colorado, is a national governing body for bicycle racing in the United States. It covers the disciplines of road, track, mountain bike, cyclo-cross, BMX, and collegiate racing. In 2009, USAC had a membership organization of nearly 66,800 members