After serving its nine-month enlistment, the regiment was mustered out in June 1863. Many of the veterans of the 23rd New Jersey went on to serve in other regiments, most notably the 34th New Jersey Volunteer Infantry, which is attributed to the fact that Colonel Grubb, much respected by the Yahoos, was rumored to be the commander of the unit (he in fact went on to command the 37th New Jersey Volunteer Infantry instead)
