Population of Rancho Cucamonga, California as of February 2026. How many people live in Rancho Cucamonga today?

The exact population of Rancho Cucamonga, California as of February 2026 is estimated at 174,453 residents. Please note: this figure is an estimate and may slightly change as people get born and pass away, it also depends on migration to/from Rancho Cucamonga.

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