The latest commitments come two weeks out from the Upper Hunter by-election on May 22 and follow years of lobbying by local organisations.

NSW Deputy Premier John Barilaro and Nationals candidate for Upper Hunter David Layzell made the announcements in Muswellbrook and Singleton on Monday.

Upper Hunter hospitals have been thrust into the spotlight throughout the election campaign, with Labor, Shooters, Fishers and Farmers and One Nation candidates for the Upper Hunter hitting out hard at the Coalition's lack of action on local hospital security and critical staffing shortages.

In 2019, the NSW government unveiled their $21.5 million Muswellbrook Hospital Redevelopment which included a new wing, however two years down the track it is still in need of crucial equipment.

NSW Labor committed $32 million to the next stages of the Muswellbrook Hospital redevelopment earlier in the month.

Labor Leader Jodi McKay said the fact that the hospital has a surgical ward but no accompanying operating theatre was "ludicrous".

Independent candidates Kirsty O'Connell and Tracy Norman last week announced their plans to cross preference at a press conference held at the hospital, where they jointly called for mining royalties to be put towards healthcare in the region.

The proposed Stage 3 upgrade to the hospital has been in planning stages since 2018 and includes improvements such as a new 26-bed inpatient unit, with two palliative care beds, a four-bed maternity inpatient unit and two birthing suites.

Nationals candidate for Upper Hunter David Layzell said "as a father of four I know how important it is to have great maternity services available locally".

"This will be a welcome boost for our region in attracting young families to live, work and play in the Upper Hunter, as well as providing relief to those who already call this region home," he said.

NSW Labor had also previously pledged $17 million for upgrades to Singleton Police Station if elected on May 22.

The current police station in Singleton has been serving the community since 1867 and the heritage listed building is home to around 50 staff.

Hunter Valley Police District numbers have been steadily increasing, from 163 in 2019 to 181 this year, and the NSW government's announced for a new station is aiming to accommodate for future growth.