The 27th New Jersey Volunteer Infantry was an American Civil War infantry regiment from New Jersey that served a nine-month enlistment in the Union Army. It was the only nine-month Regiment from New Jersey with an eleventh Company ("Company L"). When their term of service expired in June, the 27th volunteered to remain for 1 more month during the time of the "Pennsylvania Emergency" when Lee's army threatened the north. The 27th was on duty first in Wheeling, West Virginia, then they moved to Pittsburgh, Pennsylvania, and finally to guard a bridge at Harrisburg, Pennsylvania, June 26, 1863.