Henry Edward Cooper (August 4, 1904 – October 17, 2000) was an English-American PGA Tour golfer of the 1920s and 1930s. After he retired from competitive golf, he became a well-regarded instructor, into his 90s. In his long golf career he had 30 PGA Tour victories and was inducted into the World Golf Hall of Fame in 1992.

Cooper was born in the town of Leatherhead, England. His father Syd was a professional golfer who had served as an apprentice to Old Tom Morris at St. Andrews. His mother, Alice Cooper, was also a golf professional, a very rare career for women in that era. His family moved to Texas when Cooper was young, and his father took a job as a club professional in Dallas.

Cooper honed his skills at Cedar Crest and turned professional in 1923. His first pro win, the Galveston Open in 1923, came before he turned twenty years of age. A perennial U.S. Open contender (with seven top-10 finishes and second place in 1927 and 1936), Cooper was nicknamed "Lighthorse Harry" by sportswriter Damon Runyon for his quick pace of play in winning the inaugural Los Angeles Open in 1926, completing the final 18 holes in 2.5 hours. (During the American Revolution, Lighthorse Harry Lee was a cavalry officer in the Continental Army, later the father of Confederate general Robert E. Lee.)

Cooper played in the inaugural Masters Tournament and placed second there in 1936 and 1938. He reached the semi-finals of the PGA Championship in 1925. In all, he finished in the top-10 11 times in major championships.

Cooper lost an 18-hole playoff to Tommy Armour for the 1927 U.S. Open title, at Oakmont Country Club. Armour had to make a birdie on the difficult 72nd hole, and did so with a long iron approach and a ten-foot putt, to tie Cooper, who had already finished.

At the U.S. Open in 1936 at Baltusrol Golf Club in Springfield, New Jersey, Cooper was involved in a highly controversial showdown with Tony Manero, who was suspected of cheating. Manero defeated Cooper, who had already finished with a then-record score, by two shots to win the tournament; over the final holes, Manero was apparently receiving assistance in club selection from Gene Sarazen, a top player and fellow Italian-American, who had already finished his round. The Rules of Golf were later modified to prevent this, specifying automatic disqualification for a player who received advice from anyone except his caddie.

His 30 PGA Tour titles are a record among players who never won a major championship, but Cooper did win the 1934 Western Open at a time when this event was one of the world's most important titles.

In later years, Cooper would say that he had a mental hangup during major tournaments and couldn't picture himself in the winner's circle. His greatest successes were in Canada, as he won the Canadian Open in 1932 and 1937. He won 30 PGA Tour titles in all and the inaugural Vardon Trophy in 1937; his 30 titles were a record for PGA Tour players born outside the U.S. until surpassed by Vijay Singh in 2008. He was active as a senior golfer, placing sixth in the 1955 Senior PGA Championship. He was inducted into the World Golf Hall of Fame in 1992.