Organic farming is one of the fastest growing segments of U.S. agriculture. As consumer interest continues to gather momentum, many U.S. producers, manufacturers, distributors, and retailers are specializing in growing, processing, and marketing an ever-widening array of organic agricultural and food products. This report summarizes growth patterns in the U.S. organic sector in recent years, by market category, and describes various research, regulatory, and other ongoing programs on organic agriculture in the U.S. Department of Agriculture.