With his second wife Steinbeck had two sons—Thomas ("Thom") Myles Steinbeck (born 1944) and John Steinbeck IV (1946–1991).
От второй жены у Стейнбека родились двое детей — Томас Майлс Стейнбек (1944) и Джон Стейнбек IV (1946—1991).