Parsippany is a city located in the New Jersey region of the United States. During the most recent census, Parsippany had a population of 51,144. Parsippany is the 23rd most poplulated city in the New Jersey region, the 794th most populated city in the United States and the 6,784th most populated city in the world. Parsippany is in the America/New York timezone which is 4 hours behind UTC. Parsippany adjusts the hour with daylight savings time during the winter months.