Monmouth Beach is a town located in the New Jersey region of the United States. During the most recent census, Monmouth Beach had a population of 3,279. Monmouth Beach is the 353rd most poplulated city in the New Jersey region, the 7,911th most populated city in the United States and the 36,143rd most populated city in the world. Monmouth Beach is in the America/New York timezone which is 4 hours behind UTC. Monmouth Beach adjusts the hour with daylight savings time during the winter months.