K. C. Jones (born May 25, 1932) is an American retired professional basketball player and coach. He is best known for his association with the Boston Celtics of the National Basketball Association (NBA), with which he won 11 of his 12 NBA Championships (eight as a player, one as an assistant coach, and two as a head coach). As a player, Jones is tied for third for most NBA championships in a career, and is one of three NBA players with an unsurpassed 8-0 record in NBA Finals series outcomes.

Jones played college basketball at the University of San Francisco and, along with Bill Russell, led the Dons to two NCAA championships in 1955 and 1956. Jones also played with Russell on the United States team which won the gold medal at the 1956 Olympic Games in Melbourne, Australia.

After completing college and joining the NBA, Jones considered a career as a NFL player, even trying out for a team. However, he failed to make the cut. During his playing days, he was known as a tenacious defender. Jones spent all of his nine seasons in the NBA with the Boston Celtics, being part of eight championship teams from 1959 to 1966. Jones (along with Russell and five others) are the only players in history to win an NCAA Championship, an NBA Championship, and an Olympic Gold Medal.

In NBA history, only teammates Bill Russell (11 championships) and Sam Jones (10 championships) have won more championship rings during their playing careers. After Boston lost to the Philadelphia 76ers in the 1967 playoffs, Jones ended his playing career.

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