John J. Mershon (September 16, 1908 – July 6, 2004) was an American politician.

He served as a Democratic member of the New Mexico House of Representatives.

[2] Mershon was born in Siloam Springs, Arkansas.

[4] In 1958, Mershon was elected to the New Mexico House of Representatives,[3] serving until 1982.

Mershon died on July 6, 2004 in Alamogordo, New Mexico,[3] at the age of 95.