Rigo 23 (born Ricardo Gouveia, 1966) is a Portuguese-born American muralist, painter, and political artist. He is known in the San Francisco community for having painted a number of large, graphic "sign" murals including: One Tree next to the U.S. Route 101 on-ramp at 10th and Bryant Street, Innercity Home on a large public housing structure, Sky/Ground on a tall abandoned building at 3rd and Mission Street, and Extinct over a Shell gas station. He resides in San Francisco, California.