Arthur Jonathan Wall Jr. (November 25, 1923 – October 31, 2001) was an American professional golfer, best known for winning the Masters Tournament in 1959.

Wall was born and raised in Honesdale, Pennsylvania. He and his younger brother "Dewey" caddied for their parents, starting around age ten, and began playing shortly after. The brothers served in the military during World War II. Art served in the Army Air Forces and Dewey in the Navy. Dewey was killed at the age of 20 in October 1944 when his submarine USS Shark was sunk in the Pacific Ocean near Taiwan.

Wall won the Pennsylvania Amateur in 1947 and 1949. He attended Duke University and graduated in 1949 with a business degree.

Wall won 14 titles on the PGA Tour, including four in 1959. That year he was chosen as the PGA Player of the Year, and also won the money title and Vardon Trophy for lowest scoring average. His most notable career achievement was his victory at the Masters. In the final round in 1959, he birdied five of his last six holes to shoot a 66 and overtake Cary Middlecoff and defending champion Arnold Palmer.

He was a member of three United States Ryder Cup teams: 1957, 1959, and 1961. Wall is also notable for sinking 45 holes-in-one in his playing career (including casual rounds), a world record for many years.

Wall's final tour win came as a grandfather at age 51 years 7 months at the Greater Milwaukee Open in 1975, which was his first tour win in nine years.

Wall died at the age of 77 from respiratory failure after a lengthy illness. He is buried at Glen Dyberry Cemetery in Honesdale, Pennsylvania.

PGA Tour playoff record (5–5)