Green Knoll is a town located in the New Jersey region of the United States. During the most recent census, Green Knoll had a population of 6,200. Green Knoll is the 267th most poplulated city in the New Jersey region, the 5,510th most populated city in the United States and the 26,972nd most populated city in the world. Green Knoll is in the America/New York timezone which is 4 hours behind UTC. Green Knoll adjusts the hour with daylight savings time during the winter months.