South Amboy is a town located in the New Jersey region of the United States. During the most recent census, South Amboy had a population of 8,631. South Amboy is the 203rd most poplulated city in the New Jersey region, the 4,375th most populated city in the United States and the 22,792nd most populated city in the world. South Amboy is in the America/New York timezone which is 4 hours behind UTC. South Amboy adjusts the hour with daylight savings time during the winter months.