Owner Saputo Australia on Thursday announced King Island Dairy would have one final season before shutting in mid-2025, ending the brand.
The future of the business had been under a cloud for 10 months after Saputo launched a strategic review of the facility.
King Island Dairy operations began in the early 1900s and is one of the biggest employers in the tiny outpost, home to about 1600 people.
King Island Dairy is one of the biggest employers in the tiny outpost. (James Ross/AAP PHOTOS)
Saputo chief operating officer Leanne Cutts said the decision to wind up the business was difficult.
She said "every possible option" had been reviewed but closure was the most viable way to strengthen Saputo's competitiveness in a changing market.
"As King Island Dairy's historic roots are deeply embedded in the region, it was hoped the strategic review would identify a potential buyer for the facility," Ms Cutts said.
"It is a unique brand, with a plant that is nearly 100 years old.
"Our other Tasmanian brands such as Mersey Valley and Tasmanian Heritage are thriving.
"(While) King Island Dairy products hold a nostalgic place in the hearts of Australians, the brand has not maintained its position in today's ultra-competitive food industry."
Saputo, which bought King Island Dairy in 2019, says 58 employees will be impacted but "redeployment opportunities" would be identified where possible.
Ms Cutts said Saputo would work with dairy farmers and the island's broader community.
Tasmanian Premier Jeremy Rockliff said Saputo's decision was very disappointing.
"We are providing immediate support to the company's workers, farmers and the wider island community," he said.
Mr Rockliff said the state government was prepared to work with the company in a further effort to find a new operator.
Saputo describes itself as one of the top 10 dairy processors in the world.
King Island has a unique climate based on its location and provides lush grazing for cows and unusually sweet milk.
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