Premier Gladys Berejiklian said 40 per cent of the state's population was now fully vaccinated.
"That is an incredible milestone to have reached given where we were a few months ago," the premier said on Sunday.
The three deaths in the 24 hours to 8pm on Saturday were a woman in her 50s who'd had one vaccine dose, who died at Blacktown Hospital, a woman in her 70s who died at Campbelltown Hospital and a man in his 70s who died at Liverpool Hospital, both of whom were unvaccinated.
The death toll for the current NSW outbreak is now 126.
There are 1,030 COVID-19 patients in NSW in hospital, with 175 in intensive care and 72 who require ventilation.
Meanwhile, police, fire and emergency services staff in Sydney's coronavirus hotspots will be jabbed in big numbers on Sunday as the state targets them in a "super vaccination blitz".
After announcing a record day for case numbers with 1533 positive cases on Saturday, Mr Hazzard said the government wanted to make sure all frontline workers are vaccinated, describing Sunday as a "golden opportunity" for any hold-outs.
At least 73 per cent of NSW residents aged 16 and over have been vaccinated at least once, with more than 7.3 million jabs administered in the state.
There are 183 more cases of COVID-19 in Victoria.
Health authorities on Sunday reported the additional coronavirus patients, adding that 101 of the cases are linked to known cases and outbreaks.
The state's chief health officer continues to urge more people to get vaccinated in order to hold back the "tsunami" of potential cases.
State-run clinics administered 29,950 vaccines on Saturday.
About 25,000 AstraZeneca vaccination bookings remained available over the next week, Brett Sutton said.
"We know people are more than fed up. They are absolutely frustrated and challenged by the lockdown that's gone on for weeks," he told reporters.
"There's no question that it's hard, (but) the alternative is too awful to contemplate; tens of thousands of cases could be our reality if we don't maintain those really tricky constraints on our life.
"We've held back a tsunami of cases for 20 months. We've got maybe the biggest challenge we've faced, but we've got a proper pathway out of here with vaccination."
Statistics provided on Saturday revealed there were 76 people in Victorian hospitals, including 23 in intensive care.
None of those people have been fully vaccinated.
Prof Sutton said Victoria could reach a plateau if vaccination rates stayed high and virus cases stayed under control.
"That is our opportunity and we have to grab it with both hands," he said.
"So hold the line in these last weeks and months until we get the high vaccination coverage."
The mother of a four-year-old girl who has COVID-19 has also tested positive for the virus in Queensland.
Premier Annastacia Palaszczuk says the woman tested negative twice before returned a positive result among 8330 tests in the 24 hours to 6:30am on Sunday.
The woman was already in home quarantine when she tested positive.
However the premier is still concerned that the index case who transmitted the virus to a truck driver, who then spread the virus to the girl, is still out there.
AAP with The Project.