The 1st New Jersey Infantry Regiment was an American Civil War Union Army regiment of infantry from New Jersey that served in the Army of the Potomac.

The regiment and brigade served as the 1st Brigade of the 1st Division of the VI Corps, and participated in numerous battles from the June 27, 1862, Battle of Gaines's Mill, Virginia, to the final Union assaults on Confederate positions at Petersburg, Virginia, in April 1865.

The remnants of the regiment were mustered out in June 1865.

153 men were killed in battle or died of wounds, 91 men died of disease and other causes.

This article about a specific military unit of the American Civil War is a stub.