Mark Edmondson (born 28 June 1954 in Gosford, New South Wales) is a retired Australian professional tennis player.

Edmondson won the 1976 Australian Open while ranked 212th in the world, and remains the lowest-ranked winner of a Grand Slam tournament since the ATP rankings were introduced in 1973.

[1] He is the last Australian to date to win the men's singles at the Australian Open.

[2] Edmondson's best subsequent performance in Grand Slams was reaching the semifinals of the Australian Open in 1981 and Wimbledon in 1982, which took him to a career-high singles ranking of #15.

As a doubles player, he won 34 titles, including five in Grand Slams.