Police are on the hunt for the attacker who sexually assaulted a four-year-old girl in a public toilet on the Sunshine Coast.

Sunshine Coast police were scouring CCTV footage to identify the person responsible for the attack, which occurred last Friday.

Police said the girl was assaulted at toilets at Tickle Park at Coolum Beach sometime between 4.30pm and 5.30pm.

A police spokesman would not say if they were looking for a man or woman.

Police are appealing to anyone with information to come forward.