John Lee "Johnny" Baldwin[1] (born August 26, 1949 in Detroit) is an American boxer who competed in the Light Middleweight (71 kg) category.

He won an Olympic bronze medal in 1968.

Known as "The Mad" Baldwin, he turned pro in 1970 and lost a decision to Marvin Hagler in 1975.

In 1977 he took on Rocky Mosley Jr in the ill-fated U.S. Championship Tournament, but lost via K.O.

In 1978 he lost a decision to Marvin Johnson, and retired a year later.