Roybal was born on February 10, 1916, into a Hispano family that traced its roots in Albuquerque, New Mexico back hundreds of years, to the Roybals who settled the area before the founding of Santa Fe. In 1922, a railroad strike prevented his father from being able to work, and Roybal, age 6, was brought with his family to the East Los Angeles neighborhood of Boyle Heights, where he graduated from Roosevelt High School in 1934. After graduation, Roybal joined the Civilian Conservation Corps. After serving in the CCC, Roybal studied business at UCLA and law at Southwestern University.