Our Lady of Mercy College (OLMC), is a Roman Catholic, secondary day school for girls, situated in Heidelberg, a north-eastern suburb of Melbourne, Victoria, Australia.

The college is conducted by the Sisters of Mercy, a congregation of religious Sisters founded in Dublin, Ireland, by Catherine McAuley.

OLMC is split into four houses, Loreto, Carmel, Mercy and McAuley.

These four houses compete in swimming, athletics, debating arts and maths competitions.

OLMC is a member of Girls Sport Victoria (GSV).