A Tasmanian devil sanctuary in New South Wales' Barrington Tops is about to get a whole lot larger thanks to a crowdfunding project.

The preservation project's campaign has raised $375,000 for the first stage of a $1.5 million plan to provide a mainland breeding sanctuary for the at-risk species.

It received its largest donation from American-based conservation organisation Global Wildlife, which pledged just over $100,000.

The Foundation for Australia's Most Endangered Species (FAME) also contributed $10,000, while much of the remaining funds were donated by a supporting public.

Devil Ark was established in 2010 hoping to breed disease-free, healthy devils that would re-populate Tasmania once a deadly facial tumour disease had run its course in its native population.

A North American conservation agency has been the largest contributor to the Devil Ark project. ( Supplied: Devil Ark )

General manager Tim Faulkner said the aim was to house more than 350 devils at the site.

At the moment we have 30 hectares and 150 devils and once completed this year there will be 64 hectares. The plan is to increase that to 460 hectares next year," he said.

"We replicate Tasmania very well. We want to breed devils that have wild traits, good genetics and that's what the Barrington sanctuary is doing."

He said the conservation area was also protecting other wildlife.

"Transient things that come in and out also benefit from feral pest exclusion," he said.