Martin Wostenholme (born October 11, 1962) is a Canadian former touring professional tennis and Davis Cup player.

A right-handed predominantly baseline player, Wostenholme was from 1981 to 1984 a four-time All-Ivy Leaguer in singles at Yale University.

Wostenholme had his best results on clay; a semi-finals appearance at the Guarujá, Brazil Grand Prix event in 1988 and 1991; a quarter-finals showing in the Stuttgart Outdoor Grand Prix event in 1989; and a semi-finalist in the Rio de Janeiro Grand Prix event in 1990.

In Davis Cup, Wostenholme had a career singles win-lose record of 12 and 8.

Wostenholme was born in Toronto, Canada and resided in nearby Oakville.