Manhattan is a county seat located in the New York region of the United States. During the most recent census, Manhattan had a population of 1,487,536. Manhattan is the 3rd most poplulated city in the New York region, the 7th most populated city in the United States and the 191st most populated city in the world. Manhattan is in the America/New York timezone which is 4 hours behind UTC. Manhattan adjusts the hour with daylight savings time during the winter months.