Lee Buck Trevino (born December 1, 1939) is an American professional golfer. He is an icon for Mexican Americans, and is often referred to as "The Merry Mex" and "Supermex".

Trevino was born in Dallas, Texas into a family of Mexican ancestry. He was raised by his mother, Juanita Trevino, and his grandfather, Joe Trevino, a gravedigger. Trevino never knew his father, Joseph Trevino, who left when his son was small. Trevino's childhood consisted of attending school occasionally and working to earn money for the family. At age five, he started working in the cotton fields.

Trevino was introduced to golf when his uncle gave him a few golf balls and an old golf club. He then spent his free time sneaking into nearby country clubs to practice and began as a caddy at the Dallas Athletic Club. He soon began caddying full time. Trevino had to leave school at 14 to go to work. He earned $30 a week as a caddy and a shoeshiner. He was also able to practice golf, since the caddies had three short holes behind their shack. After work, he would hit at least 300 balls. Trevino has claimed to have earned extra money by challenging competitors to rounds of golf where he used only a shovel and 32 ounce glass Dr. Pepper bottle. When he turned 17, he enlisted in the United States Marine Corps, and served four years. Part of his time was spent playing golf with Marine Corps officers. Trevino claims being a golf partner helped earn him promotion to lance corporal.