Louk Sanders (born 9 May 1950 in Oegstgeest, Zuid-Holland) is a retired professional tennis player from the Netherlands.
Sanders was Holland's second best in the 1970s after Tom Okker. The right-hander reached his highest individual ranking on the ATP Tour on 31 December 1977, when he became the number 98 of the world. Sanders played for the Dutch Davis Cup team from 1974 to 1983.