About 91730 - Rancho Cucamonga, California

The ZIP code 91730 of Rancho Cucamonga falls within California, the United States - a densely populated area by population. It sits within San Bernardino County.

Census data puts the population of this ZIP code at 71,613 residents. That's noticeably above the average for a California ZIP code, which sits near 22,296 people.

Population density runs around 2,013 people per sq. mile, making it a suburban area.

Nearby communities in California include Fontana, Pittsburg, Los Angeles.