Jeremy the koala, who became the rescue pin-up from the Adelaide Hills bushfires after his treatment photo went viral on social media, has been successfully rehabilitated and released back into the wild.

With the help of South Australian Country Fire Service (CFS) volunteers, Australian Marine Wildlife Research and Rescue Organisation (AMWRRO) volunteers and animal welfare carers, the badly injured three-year-old male koala was released on Wednesday night.

Paracombe CFS volunteer Jeremy Sparrow rescued the young koala in the days after the bushfire raged through the Adelaide Hills.

"He was sitting there, just looking at me and needed some help," he said.

His name-sake, Jeremy the koala, put up little protest when Mr Sparrow wrapped him in a towel and took him back to the unit's fire truck.

"I think he knew that help was on the way," Mr Sparrow said.

Jeremy the koala being treated for badly burned paws experienced in the Sampson Flat bushfires. ( Supplied: Aaron Machado )

Rehabilitation included time with carer

When Jeremy arrived at the AMWRRO base in Port Adelaide he was in poor physical shape and weighed 10.8 kilograms.

"He's responded extremely well to treatment," AMWRRO president Aaron Machado said.

AMWRRO volunteers prepare to release Jeremy within five kilometres from where he was rescued in the Sampson Flat bushfires. ( 891 ABC Adelaide: Brett Williamson )

Jeremy's paws were soaked, treated and bandaged for several weeks, at an estimated cost of more than $6,000 to the organisation.

After several weeks of rehabilitation, Jeremy was placed with wildlife carer Kim Thompson near his original rescue location.

"He's been climbing his tree and staying in his tree all night, which is absolutely great," Mr Machado said.

Once Jeremy's paws recovered from the burns, and he had gained an additional 800 grams in weight, volunteers were keen to release the him back into the wild.

"He just now needs to find his niche in this bit of scrub that Kim has located for him," Mr Machado said.

Rescuers, carers moved by Jeremy's release

Jeremy Sparrow, the Paracombe CFS volunteer, all smiles as his name-sake Jeremy the koala is released. ( 891 ABC Adelaide: Brett Williamson )

Mr Sparrow was almost speechless as the koala sprung from his carry case and bounded up the closest gum tree.

"It was a good feeling to see him race up that tree, quite happy and contented and I think he was voicing his approval," he said.

Mr Sparrow said he, his partner and Jeremy's final carer Ms Thompson all carried out wildlife rescues during the Sampson Flat bushfires.

"I've lost count of the amount of good ones compared to the amount of bad ones," he said.

"There's been an awful lot [of injured animals] that we have had to put down."