Pierre Cao (born 22 December 1937 in Dudelange) is a Luxembourgish composer and conductor.
Cao is the regular conductor of Arsys Bourgogne with whom he has recorded Biber's Requiem and other baroque works.
Cao is a co-founder of the Institut Européen du Chant Choral (INECC).
Cao was the musical director for both the 1973 and 1984 Eurovision Song Contests, staged in the Grand Duchy at the Nouveau Theatre.
He conducted Luxembourg's winning song "Tu te reconnaîtras" in 1973.