WESTPEX, Inc. is a non-profit 501(c)3 corporation. Its main purpose is to extend and enrich the pursuit of knowledge and enjoyment of all aspects of stamp collecting and postal history for public benefit.

The specific purposes of WESTPEX are to: (1) promote philately as a hobby to the public, with particular focus in Northern California; (2) propagate philatelic knowledge and research to the public; and (3) support similar activities by other corporations or organizations in California, the United States, or the world in the dissemination of philatelic knowledge, literature, ideas, and techniques.