Ioannis Theofilakis (Theophilakis) (Greek: Ιωάννης Θεοφιλάκης, 1879–1968) was a Greek sport shooter who competed at five Olympic games, and the 1906 Intercalated Games.

His score and place in the free rifle event is unknown, except that he did not win a medal.

For the 1906 Olympics there are currently no records found on his achievements, except that he did not win any medals.

In the 1908 Olympics he participated in four events: men's team free rifle, where he placed ninth; men's team military rifle, where he placed seventh; men's individual pistol, where he placed twenty ninth; and men's team pistol, where he placed seventh.

In the 1920 Olympics he participated in eleven events: 50 m free pistol, where he placed tenth; 50 m small-bore rifle unknown; 300 m rifle 3 positions unknown; 600 m military rifle prone, where he placed fourth; 300 m team military rifle prone, where he placed eleventh; 600 m team military rifle prone, where he placed seventh; 50 m team small-bore rifle, where he placed tenth; 300 m team military rifle standing, where he placed thirteenth; 50 m team free pistol, where he placed fourth; team free rifle, where he placed thirteenth; and 30 m team military pistol, where he placed second (silver).