Ridgefield is a city located in the New Jersey region of the United States. During the most recent census, Ridgefield had a population of 11,032. Ridgefield is the 165th most poplulated city in the New Jersey region, the 3,682nd most populated city in the United States and the 19,979th most populated city in the world. Ridgefield is in the America/New York timezone which is 4 hours behind UTC. Ridgefield adjusts the hour with daylight savings time during the winter months.