During World War II the New Jersey shelled targets on Guam and Okinawa, and screened aircraft carriers conducting raids in the Marshall islands. During the Korean War she was involved in raids up and down the North Korean coast, after which she was decommissioned in to the United States Navy reserve fleets, better known as the 'mothball fleet'. She was briefly reactivated in 1968 and sent to Vietnam to support U.S. troops before returning to the mothball fleet in 1969. Reactivated once more in the 1980s as part of the 600-ship Navy program, New Jersey was modernized to carry missiles and recommissioned for service. In 1983, she participated in U.S. operations during the Lebanese Civil War.
New Jersey was decommissioned for the last time in 1991, having earned a Navy Unit Commendation for service in Vietnam and a total of 19 battle and campaign stars for combat operations during World War II, the Korean War, the Vietnam War, the Lebanese Civil War, and service in the Persian Gulf, and is now a museum ship at Camden, New Jersey.