Joost Winnink (born 30 June 1971) is a former professional tennis player from the Netherlands.

In 1994 at the "Melkhuisje" (in his home country) Winnink upset the gravel specialist Àlex Corretja in straight sets.

At the 1995 Eurocard Open, a Masters Series event, Winnink upset countryman and world number 21 Paul Haarhuis in straight sets, dropping just two games.

He also reached the quarter-finals of the Czech Indoor tournament that year, en route defeating Javier Frana and David Prinosil, both top 100 players.

With playing partner David Prinosil he demolished the then Davis Cup doubles team of Palmer/Reneburg in the first round.