A family visiting Queensland's world-heritage listed island K'gari has narrowly escaped tragedy after a fast-acting father saved his two-year-old son from a dingo attack. 

The toddler was bitten on the thigh after an untagged female dingo, also known as wongari, charged at a family leaving a popular swimming spot on the remote island on Thursday afternoon.

Queensland Parks and Widlife Service (QPWS) rangers said the family were in the car park at Lake Mackenzie, in the heart of K'gari, when the father saw a dingo lingering near the right hand side of the car. 

Rangers said the father told his family to get into the left hand side of the car, but the dingo ran at the family before they could get to safety. 

The father was able to chase the animal away, but not before the two-year-old boy suffered two bite wounds to the thigh. 

The Department of Environment, Science and Innovation said the family drove more than 30 minutes to the nearby township of Eurong, on the south-eastern coast of K'gari, to report the incident to rangers. 

The boy was treated on the island. 

Senior Ranger Linda Behrendorff says rangers will increase patrols around the area of the attack. 

"This untagged little female is known to rangers as a habituated animal and rangers will be spending their time at Boorangoora (Lake McKenzie) over the weekend, educating people and trying keep the animal out of the area," she said.

"[We will] hopefully get a tag into that animal so that we can identify her in the future as well, and keep her out of trouble."

With the school holiday period approaching, rangers are urging all visitors to walk with a stick, keep children close, and always travel in numbers when on K'gari. 

"Dingoes are denning at the moment ... what we're looking at is some juveniles and sub-adults that aren't having their own young, so they're the ones that we tell people to keep an eye out for," Dr Behrendorff said. 

"Look at those messages, read them on the web, you can't really travel throughout the island without seeing something to do about being dingo safe."

Rangers said all negative dingo interactions should be reported to to a QPWS ranger, or by calling the Department of Environment, Science and Innovation.