Geoff Grant is an American former professional tour tennis player.

Grant reached a career high tour singles ranking of World No.

This came shortly after he achieved his best tournament result, reaching the third round of the 1998 U.S. Open, as a wild card entrant.

In only other two appearances in the main draw of a Grand Slam event, Grant lost in the first round of the Australian Open in straight sets (1997 and 1999).

In 1997, Grant compiled the best singles recond in Challenger event play, 30 wins against 14 losses.