Acting Attorney General John Hoffman announced details Tuesday. New Jersey is among the first states with plans to put them on all state troopers.
The devices are to be bought in batches over the next year. The cameras and computer upgrades have a price tag of $1.5 million.
The state also plans to use $2.5 million in forfeiture funds to help local police buy cameras.
Police cameras have been growing in use, particularly amid calls from civil liberties advocates after high-profile shootings by police, including last year in Ferguson, Missouri.