Philipp Gilgen (born October 12, 1976) is a Swiss former swimmer, who specialized in backstroke events.

He posted a FINA B-standard entry time of 56.87 from the Swiss National Championships in Zurich.

Swimming in heat three, he edged out Sweden's Mattias Ohlin to wrest a third seed by a hundredth of a second (0.01) in 57.50.

[5][6][7] Gilgen also teamed up with Remo Lütolf, Karel Novy, and Philippe Meyer in the 4×100 m medley relay.

Leading off a backstroke leg in heat one, Gilgen recorded a split of 57.31, but the Swiss team settled only for sixth place and sixteenth overall with a final time of 3:42.78.