MEPSI

Mexico Elmhurst Philatelic Society International, better known as MEPSI, is an organization devoted to the study of all aspects of the postal history of Mexico since 1952. MEPSI became a non-profit corporation under Illinois statues on February 6, 1957 and is a tax exempt educational organization under Internal Revenue Code section 501(c)(3).

MEPSI is American Philatelic Society affiliate #43.

MEPSI has the largest following in Mexico and the United States. However, the ca. 650 members are spread over more than 27 countries.