The American Philatelic Association (APA) is a nonprofit organization dedicated to the hobby of stamp collecting, known as philately. Founded in 1886, it serves as a resource for collectors of all levels, providing educational materials, publications, and access to a vast network of fellow enthusiasts. The APA also hosts events, such as stamp shows and exhibitions, where collectors can buy, sell, and trade stamps. Additionally, the organization offers expert appraisal services and promotes the preservation of philatelic history, ensuring that the art and science of stamp collecting continue to thrive in the United States.