A three-year-old girl suffered critical head injuries after falling onto concrete from a balcony on North Stradbroke Island off Brisbane.

A three-year-old girl is in a critical condition after falling from a balcony on North Stradbroke Island.

The Brisbane toddler and her family were at a Point Lookout holiday home on Friday afternoon when she fell onto concrete, RACQ CareFlight Rescue said.

She suffered suspected head injuries and was flown to the Mater Hospital.