Tony Costner (born June 30, 1962) is an American former professional basketball player, who was selected by the Washington Bullets, in the second round (34th pick overall) of the 1984 NBA draft.

In 2012, Costner was recognized by the Philadelphia Daily News, as a Third-Team All City member, on its list of the "Best high school hoops players of the past 35 years".

As a Senior, Costner averaged 18.6 points, 8.3 rebounds and 1.2 assists per game, as Saint Joseph's finished the season with a 20–9 record, under head coach Jim Boyle.

Costner went on to play pro club basketball in Europe, starting his career with Basket Napoli.

Costner also played in the Continental Basketball Association (CBA), with the Tulsa Fast Breakers, Rockford Lightning, Rochester Flyers, and Philadelphia Spirit.