The Queensland government announces a $7 billion investment to manufacture trains, set for the Brisbane 2032 Olympic Games, in regional Queensland.

Sixty-five new trains will be built at a "state-of-the-art" train manufacturing facility at Torbanlea, about 25 kilometres north-west of Maryborough.

Labor promised to build 20 new trains in the region during the 2020 state election campaign – the new plan is for more than triple that number.

The $7.1 billion investment will include new rail infrastructure in the south-east and ongoing maintenance of the newest fleet.

Speaking in Maryborough this morning, Premier Annastacia Palaszczuk said it was one of the most "significant" announcements her government had made.

The project will create 800 new full-time jobs in the Wide Bay-Burnett region.

"This is going to be the largest investment in train manufacturing that Queensland has ever seen," Ms Palaszczuk said.

Queensland Premier Annastacia Palaszczuk made the announcement in Maryborough as part of a state-wide COVID-19 vaccination blitz.(ABC News: Johanna Marie)"This is 800 jobs for this region — this is a significant announcement, 800 jobs, long-term secure jobs, setting rail manufacturing up here for the decades to come."

Ms Palaszczuk said it was the first "local-procurement" announcement for the 2032 Brisbane Olympics.

"Because these trains will be needed for the Olympics, for our Cross River Rail," she said.

"It is about investment, investment in train manufacturing here — but in terms of supply chains, it stretches to Rockhampton. There's going to be announcements on the Gold Coast as well."

Trains to be ready by 2025Transport Minister Mark Bailey said it was a necessary investment to address regional Queensland's growing population.

"They're [the trains] needed for growth that's coming to Queensland, south-east Queensland and also for the [Olympic] Games," Mr Bailey said.

"When we came to office, Maryborough was fast becoming a ghost town because Campbell Newman and David Crisafulli ordered trains from overseas and not made [them] here in Maryborough.

"Under this Labor government, under Premier Palaszczuk, Maryborough and the region is becoming the boom town."

Member for Maryborough Bruce Saunders said the first trains would hit tracks by 2025.

"Maryborough is back. Maryborough is the number one train-building facility in the southern hemisphere. We've got a great skills-base here," Mr Saunders said.

Fraser Coast Mayor George Seymour said it was a "historic" day for the region.

"Manufacturing runs in our blood in Maryborough. It's a central part of our history," Mr Seymour said.

Ms Palaszczuk said the project would now go to tender and would be awarded by mid-next year.

"I give you this guarantee – the trains will be made in Maryborough," she said.

"They will be Queensland-made, owned and operated."