Brooklyn is a county seat located in the New York region of the United States. During the most recent census, Brooklyn had a population of 2,300,664. Brooklyn is the 2nd most poplulated city in the New York region, the 4th most populated city in the United States and the 120th most populated city in the world. Brooklyn is in the America/New York timezone which is 4 hours behind UTC. Brooklyn adjusts the hour with daylight savings time during the winter months.