Police Commissioner Andrew Coster and the New Zealand Police Association have thrown their support behind the move.
Coster said the mandate was an important step for police and acknowledged that the nature of their work made this necessary to help guarantee safety - for members of the public and staff alike.
"Our work does not always allow us to stay at arm's length from the people we deal with and vaccination is the only control that can mitigate the safety risk in those situations."
Up to 92.2 per cent of police officers and staff around the country have had at least one vaccination; while 86.5 per cent have had both jabs.
Today's announcement means all police constabulary staff, authorised officers and recruits will need to have had at least their first Covid vaccination by January 17 next year and their second shot by March 1.
Association vice-president Mike McRandle said the move is supported by the group because it provides legal certainty for the police force.
"We have always held the position that it is not the role of the association to make medical or moral judgements on the question of vaccination.
"The vast majority of police are vaccinated. But as a microcosm of society, there will be a variety of opinions among members - often strong on both sides."
The risk of officers having to deal with people in all communities around the country supported the move to make sure everyone on the force was vaccinated, he acknowledged.
If officers now choose not to get vaccinated against Covid-19, the association will work to make sure they are treated as fairly and reasonably as possible with the law, McRandle said.
The association also acknowledged that looking at court cases here and in Australia, they could find no precedent that would be successful in overturning a legal mandate announced by government officials.
"But we will continue to monitor that space."
