Olivier Schmitthaeusler (born 26 June 1970) is the current Apostolic vicar of Phnom Penh since 10 October 2010.

Olivier was born in Strasbourg in 1970 as the eldest child of a big family.

He entered in 1989 in the major seminary of Strasbourg where he studied philosophy and theology.

Back to France he was ordained a priest for the Paris Foreign Missions Society on 28 June 1998 in the Strasbourg Cathedral.

The day before Christmas 2009, he was named coadjutor vicar of Phnom Penh in order to replace bishop Émile Destombes, who was about to resign for age reasons.