Brooklyn (NYC borough) is 2.8 times larger than Newark, New Jersey.
Area: 180 km2 calculated
Population: 2,565,635 (2012)
Brooklyn is the most populous of New York City's five boroughs, with about 2.6 million people, as well as the second-largest in area. Wikipedia
Area: 63 km2 calculated
Population: 277,727 (2012)
Newark is the largest city in the U.S. state of New Jersey, and the county seat of Essex County. Wikipedia