Carlos De León, also known as "Sugar" De Leon, (May 3, 1959 – January 1, 2020) was a Puerto Rican boxer who made history by becoming the first cruiserweight to win the world title twice. Subsequently, he kept breaking his own record for the most times as cruiserweight champion by regaining the title on two further occasions.

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De León, a native of Trujillo Alto, Puerto Rico, first won a world title when he faced the WBC world champion Marvin Camel on November 25, 1980, replacing David Pearce the Great Britain boxer on the undercard of Sugar Ray Leonard and Roberto Durán's second fight in New Orleans. De León outpointed Camel over fifteen rounds. In a rematch later, De León knocked out Camel in eight rounds. When his countryman Ossie Ocasio won the WBA world title, De León and Ocasio became the second pair of Puerto Ricans to share world titles in the same division at the same time; Alfredo Escalera and Samuel Serrano had achieved the feat in the 1970s in the junior lightweight division.

During the 1990s, De León ran afoul of the law a number of times, once while he was carrying a rifle. He worked on helping the professional boxing career of his son, prospect Carlos de León Jr.

He died on January 1, 2020, due to a cardiac arrest.^[1] He was 60.

• List of cruiserweight boxing champions
• List of WBC world champions
• List of Puerto Rican boxing world champions
• List of Puerto Ricans