Luis José Monge (August 21, 1918 – June 2, 1967) was a convicted mass murderer who was executed in the gas chamber at Colorado State Penitentiary in 1967. Monge was the last inmate to be executed before an unofficial moratorium on execution that lasted for more than four years while most death penalty cases were on appeal, culminating in the U.S. Supreme Court decision in Furman v. Georgia in 1972, invalidating all existing death penalty statutes as written.