Health Minister Greg Hunt said the achievement puts the country "right at the front of the highest global vaccination rate".
He said 95 per cent of Australians aged 12 and over have now had at least one dose of a vaccine, as of Saturday.
"Very significantly, over the course of today we will also pass one million children between five and 11 years of age having had a vaccination," he said.
Mr Hunt said this rate of vaccination for children was one of the highest rates in the world.
It comes as an estimated crowd of more than 2000 protest against vaccination mandates outside Old Parliament House on Saturday, flanked by police.
ACT Police and the AFP on Friday moved on protesters who had allegedly illegally camped and parked cars on lawns across from the National Library.
A 44-year-old man has been charged with possessing an unauthorised weapon and ammunition after officers allegedly found a loaded rifle in his vehicle on Friday.
He appeared in the ACT Magistrates Court on Friday and was granted bail on the condition he does not re-enter Parkes.
was arrested after officers allegedly discovered a loaded, modified rifle in his vehicle. He is expected to be charged with weapon and traffic offences.
Meanwhile, a leading infectious diseases expert has warned booster rates among young people are not high enough to ensure adequate protection against the Omicron variant.
Sanjaya Senanayake from the Australian National University said while the take-up rate of COVID-19 boosters was progressing well among older people, it was lagging in the younger population.
"Part of it may be that there may be a perception that Omicron isn't as bad, and this is somewhat of a fatalistic approach that we have been dealing with this for so long," he told the ABC.
The most recent vaccination figures show more than 8.6 million people have received their third dose of a COVID-19 vaccine.
However, almost one-third of the population eligible for a third dose have not yet had their booster.
Saturday was also meant to mark the lifting of Western Australia's hard border, before the date was scrapped by Premier Mark McGowan.
It is still not known when WA will open for free travel with the rest of the country.
However, Prime Minister Scott Morrison said he could understand the reasons behind the WA government's decision.
"When the Western Australian government makes a decision not to reopen that border because of their concerns about how it will impact their hospital systems ... then I can absolutely understand the decision of the premier," Mr Morrison said.
NSW reported 18 deaths in the 24 hours to 8pm on Friday, and 8389 new positive cases of COVID-19, as the state continues to show signs it is beyond the peak of cases.
Victoria reported 7809 new cases and 41 deaths, while the ACT reported 372 new cases and one death, taking the territory's toll to 27.
There were another 84 COVID-19-related deaths across the country reported on Friday, with 36 in Victoria, 31 in NSW, 13 in Queensland, three in SA and one in the ACT.
Nationally, there were more than 31,000 new infections reported on Friday.
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