Brooklyn (NYC borough) is 74% larger than Rancho Cucamonga, California.
Area: 104 km2 calculated
Rancho Cucamonga is a suburban city in San Bernardino County, California. As of 2014, Rancho Cucamonga's population was 165,775 people.Since 2000, it has had a population growth of 29.53 percent. L. Dennis Michael was elected as the city's mayor on November 2, 2010. Wikipedia
Area: 180 km2 calculated
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