Prison Officials say 31-year-old Ramon Perez disappeared sometime between 9 and 10:30 last night.
The minimum security inmate was last seen at the prison's dairy, which is located outside the electrical fence.
Perez is 5'2" weighs 140 pounds and has three tattoos.
One on his upper back that reads "Perez," one on the back of his neck that has the letters "SFV," and a third on his stomach that reads "sanfer."
Perez was serving a six year sentence for possession of a controlled substance for sale, burglary and vehicle theft.
Anyone with information about Perez is asked to call the Corcoran Prison at 559-992-6120.