The Infrastructure Department will move the jobs to central west NSW in another wave of decentralisation, swelling the number of public servants leaving the national capital under 2019 federal budget promises.

Budget papers last week showed more than 120 jobs would leave Canberra for the regions as the Coalition appealed for regional voters ahead of the federal election expected next month. Another 25 roles were marked for Orange but the government did not state where the jobs would move from.

Decentralisation Minister Bridget McKenzie's office has since revealed Canberra will lose 24 of the jobs marked in the budget for relocation to the central west NSW city, where the Shooters, Fishers and Farmers Party has wrested voters from the Nationals in state elections.

The tally of jobs leaving Canberra, reaching more than 140 under 2019 budget promises, would make the next wave of public service relocations the largest to hit the national capital since the pesticides authority's turbulent move to ex-Nationals leader Barnaby Joyce's northern NSW electorate. 

After ending the Nationals' 69-year-old grip on the state seat of Orange in a 2016 by-election, Shooters, Fishers and Farmers Party MP Phil Donato easily retained it in March's NSW poll with 49 per cent of the primary vote.

Despite calls to relocate public service jobs from Sydney and Melbourne instead of Canberra, the ACT is bearing the brunt of the Coalition's decentralisation plans, losing the bulk of 191 promised to the regions this year.

Of the jobs to go bush in 2019-20, the ACT would lose 35 jobs from the Department of the Prime Minister and Cabinet's Indigenous Affairs group, 10 from Indigenous Business Australia and others from the Australian Financial Security Authority under a Coalition government.

The promises are in addition to the Coalition's pledge last month to move 76 Murray Darling Basin Authority staff from Canberra to Mildura, Goondiwindi, Griffith and Murray Bridge.

The Coalition government has baked its decentralisation project into annual budget decision-making, telling departments to consider their regional footprint every year.

Portfolios this year reviewed their regional staffing and described it in annual statements for the federal budget, a task the Coalition wants the public service to repeat yearly if it wins re-election.

Senator McKenzie and Nationals leader Michael McCormack called it a "rigorous" process, signalling the Coalition's attempt to add more order to a project steeped in drama when the government forced the pesticides authority to move to Armidale.

Finance Minister Mathias Cormann said more than 1700 jobs had moved from Canberra, Sydney and Melbourne since the Coalition came to power.