Joan "Zeta" Zamora is a mixed media artist who came to the United States illegally from Mexico at age eight. Her addresses have included Bell Gardens, Panorama City, Sun Valley, London, San Francisco, and East LA. She currently lives and works in South Los Angeles.

Joan Z. earned a bachelor's degree from San Francisco State University with an emphasis in painting and photography. In 2013, she joined the Ovarian Psycos, an all-women of color bicycle brigade, and appeared in the PBS documentary about them. Three years later, she left the Ovarian Psycos to help cofound Ni Santas, an all-women of color art collective. Ever since, she has been making her artwork, creating collaborative art, and conducting free art workshops with Ni Santas. 

Joan "Zeta" Zamora's art has appeared in the television show Insecure (season 4, episode 8) and the film The American Society of Magical Negroes (2024). One of her Day of the Dead altars was featured in a web episode of PBS's Craft in America. She is also a teaching artist for Self Help Graphics & Art's Barrio Mobile Art Studio.