Hillside is a city located in the New Jersey region of the United States. During the most recent census, Hillside had a population of 22,155. Hillside is the 74th most poplulated city in the New Jersey region, the 2,001st most populated city in the United States and the 12,754th most populated city in the world. Hillside is in the America/New York timezone which is 4 hours behind UTC. Hillside adjusts the hour with daylight savings time during the winter months.
Hillside is located at sea level (30 meters / 98 feet). The closest cities to Hillside are Union (2.8 km / 1.8 miles), Irvington (3.5 km / 2.2 miles), Elizabeth (4.5 km / 2.8 miles), Maplewood (5.0 km / 3.1 miles) and Roselle (5.0 km / 3.1 miles)