Auckland District Health Board has become the first DHB in the country to be 90 percent fully vaccinated.
The district health board reached the milestone this afternoon, according to the city's health authorities.
The city's two other DHBs are also nearing the target, with Waitemata at 87 percent double dose rates and Counties Manukau at 84 percent.
Waitemata DHB needs another 17,520 people to get their second dose to reach 90 percent, while Counties Manukau DHB needs a further 30,390 people to get their second dose.
Director-General of Health Dr Ashley Bloomfield said it was a "phenomenal achievement", with 381,562 people in Auckland DHB receiving both doses.
"I want to congratulate you all for your outstanding commitment towards making New Zealand a safer place for yourselves, your whanau and your communities," he said in a statement.
"I also acknowledge that Auckland has faced our greatest burden during this Delta outbreak and everyone across New Zealand owes a debt of gratitude to all Aucklanders for helping to keep us safe. Thank you."
Nine DHBs have now vaccinated at least 90 percent of their eligible population with their first doses, including the three Auckland DHBs, MidCentral, Capital & Coast, Hutt Valley, Wairarapa, Canterbury and Southern.
Another four DHBs - Waikato, Hawke's Bay, Nelson Marlborough and South Canterbury - have reached 89 percent first doses and only need to vaccinate 4300 more people between them to hit 90 percent.
To reach 90 percent fully vaccinated across the country, another 317,148 people need to get their second doses - about 7.5 percent of the eligible population.
"I urge everyone who is yet to get vaccinated to please do so and for those of you yet to get your second dose, do it now if it is three weeks since your first dose. This is your best way of protecting yourself, your loved ones and your communities from COVID-19," Dr Bloomfield said.