Establishing the Great Koala National Park north of Port Macquarie is one of 42 recommendations in a NSW Upper House report into koala population and habitat.
The report was released on June 30.
It also calls on the state government to protect more koala habitat or risk the koala becoming extinct by 2050.
The GKNP would be sited on the Coffs Harbour hinterland stretching immediately north of Kempsey through to Woolgoolga. Port Macquarie-Hastings is not part of the planned park.
Port Macquarie Koala Hospital clinical director Cheyne Flanagan supported the report's view that the koala is facing extinction.
She praised the report's authors for their "very detailed work".
"If we literally do not change what we are doing (regarding development), we will lose the koala as a species," she said.
"Shame on Australia if that happens.
Shame on Australia if that happens.Cheyne Flanagan
"There is too much pressure from development; the all mighty dollar really is what this is about (the push into koala habitat).
"But if you want to consider the economics of this, the koala tourism industry is worth $6 billion a year across Australia.
"That is nothing to sniff at."
Ms Flanagan said it was wrong that this innocuous creature is being killed off.
"Bear in mind too that there are a number of other species under serious threat, including the Yellow-bellied Glider and the Greater Glider," she added.
The clinical director said the koala hospital supported the push for a national koala park adding: "It certainly has merit."
At its release, inquiry committee chair and Greens MP Cate Faehrmann called the report a "game-changer for koalas and the protection of their habitat".
"What became crystal clear during this Inquiry was that without urgent government intervention the koala will become extinct in NSW before 2050," Ms Faehrmann said.
"The report found that habitat loss and fragmentation was the biggest threat to koalas, yet at every turn we were handed evidence that showed our current laws are inadequate and facilitating the clearing of core koala habitat.
"The strategies and policies currently in place to protect the koala aren't working, like the NSW Koala Strategy which fails in ensuring enough koala habitat is protected for the different koala populations across the state.
"There must be a significant increase in koala habitat protected from logging, mining, land clearing and urban development."
In relation to the Mid-North and North Coast, the report "has demonstrated beyond doubt that decades of logging in public native forests has had a devastating impact on koalas and their habitat," the inquiry chair said.
"The government must immediately identify and protect koala populations and habitat in the wake of this apocalyptic bushfire season.
"The committee has proposed that the government investigate the establishment of the Great Koala National Park.
"I urge the government to do this without delay. The committee heard compelling evidence that the park would protect large areas of core koala habitat while creating a globally significant tourist attraction."
If established, the Great Koala National Park would add some 175,000 hectares of state forests to existing protected areas to form a 315,000 hectare reserve.
According to the GKNP steering committee chairman and president of the National Parks Association Coffs Harbour branch, Kevin Evans, establishing the park would also mean employment opportunities.
The idea for the park was first mooted in 2014 and became an election promise for the NSW Labor Party leading into the 2015 state election.
He says the association supports all 42 recommendations in the report.
"The steering committee would like to see the government implement all 42 recommendations from the inquiry as a matter of urgency," he said.
"While Labor and the Greens support the park, so far we have no seen that support from the coalition on its implementation.
"The Great Koala National Park should be a priority."
Mr Evans said clear fell logging of up to 60 hectares in one forest compartment is allowed with no obligation to look for koalas.
The Great Koala National Park should be a priority.Kevin Evans
He said the state government undertook a review of the proposed park which showed that current logging correlates with koala hubs identified by the governments own scientists.
The steering committee member said he would welcome Port Macquarie-Hastings being included in the proposed park.
He agreed there were long term employment opportunities if the park were established.
"This park would support the already enormous level of nature-based tourism that flourishes in our area," he added.
Minister for environment and energy, Matt Kean thanked the committee for its work.
"Last season's bushfires had a devastating impact on our koala population," he said.
"Koalas are an iconic Australian animal recognised the world over, and a national treasure which we will do everything we can to protect for future generations.
"That's why the NSW government has committed to our $44 million koala strategy, the largest financial commitment to protecting koalas in the state's history.
"That said I am looking forward to reviewing the report, and seeing what further can be done to protect this Australian icon."