Backyard chickens are legal in New Jersey, but regulation happens at the municipal level. There's no statewide statute—each town sets its own ordinance. Here's the typical framework.
Before buying chicks, search "[Your Town] NJ chicken ordinance" or call the municipal clerk. Some towns (e.g., Jersey City, Hoboken) allow chickens with permits; others (e.g., some Bergen County suburbs) ban them outright. HOAs can impose stricter rules.
NJ Department of Agriculture encourages biosecurity: register your flock (voluntary), practice NPIP standards, report sick birds. No state permit needed for small flocks.
Bottom line: Yes, you can—if your town says so. Do the homework first.