New Jersey State Highway 124 is a state highway in New Jersey, United States. It is the eastern section of what used to be New Jersey State Highway 24 before that road was realigned to a freeway. The western end of NJ 124 is at an intersection with United States Highway 202 in Morristown, New Jersey; the eastern end is at the border between Maplewood, New Jersey and Irvington, New Jersey on Springfield Avenue.