Warren Lahr (September 5, 1923 – January 19, 1969) is a former professional American Football player who played defensive back for the Cleveland Browns (1949–1959). He was originally drafted by the Pittsburgh Steelers in the 1947 NFL Draft. Lahr intercepted 40 passes from 1950 to 1959 to rank second on the team's all-time list, trailing only Thom Darden's team record 45 interceptions. He died in 1969 at the age of 45.