Philippe Jaroussky (born 13 February 1978) is a French countertenor. He began his musical career with the violin, winning an award at the Versailles conservatory, and then took up the piano before turning to singing.

Unusually for a countertenor, Jaroussky performs entirely in falsetto register. He has said that his natural singing voice is in the baritone range. Jaroussky was born in Maisons-Laffitte. His great-grandfather was a Russian émigré of Jewish origin who fled from the Bolshevik Revolution. Jaroussky was inspired to sing by the Martinique-born countertenor Fabrice di Falco. He received his diploma from the Early Music Faculty of the Conservatoire de Paris. Since 1996, he has studied singing with Nicole Fallien. He cofounded the ensemble Artaserse in 2002, and has also often performed with the Ensemble Matheus under Jean-Christophe Spinosi and with L'Arpeggiata under Christina Pluhar.