Rancho Cucamonga population
Rancho Cucamonga, California had an estimated 177,856 residents on July 1, 2025, the 156th-largest city in the US. That is up 7.6% since the 2010 Census and up 39.2% since 2000.
- Population, July 2025
- 177,856+1.9% since April 2020
- People per sq mile
- 3,82446.5 sq mi of land
- Median age
- 38.614.5% are 65 or older
- Households with kids
- 33.8%with anyone under 18
Population by year, 2000 to 2025
| Year | Population | Change | Basis |
|---|---|---|---|
| 2025 | 177,856 | +854 | Estimate, July 1 |
| 2024 | 177,002 | +1,270 | Estimate, July 1 |
| 2023 | 175,732 | +584 | Estimate, July 1 |
| 2022 | 175,148 | -161 | Estimate, July 1 |
| 2021 | 175,309 | +692 | Estimate, July 1 |
| 2020 | 174,617 | -3,939 | April 2020 estimates base |
| 2019 | 178,556 | +277 | Estimate, July 1 |
| 2018 | 178,279 | +472 | Estimate, July 1 |
| 2017 | 177,807 | +1,100 | Estimate, July 1 |
| 2016 | 176,707 | +1,442 | Estimate, July 1 |
| 2015 | 175,265 | +1,534 | Estimate, July 1 |
| 2014 | 173,731 | +1,779 | Estimate, July 1 |
| 2013 | 171,952 | +1,213 | Estimate, July 1 |
| 2012 | 170,739 | +1,691 | Estimate, July 1 |
| 2011 | 169,048 | +3,779 | Estimate, July 1 |
| 2010 | 165,269 | +2,558 | 2010 Census (April 1) |
| 2009 | 162,711 | +1,960 | Estimate, July 1 |
| 2008 | 160,751 | +2,096 | Estimate, July 1 |
| 2007 | 158,655 | +2,628 | Estimate, July 1 |
| 2006 | 156,027 | +3,604 | Estimate, July 1 |
| 2005 | 152,423 | +4,749 | Estimate, July 1 |
| 2004 | 147,674 | +5,360 | Estimate, July 1 |
| 2003 | 142,314 | +4,821 | Estimate, July 1 |
| 2002 | 137,493 | +4,237 | Estimate, July 1 |
| 2001 | 133,256 | +5,501 | Estimate, July 1 |
| 2000 | 127,755 | April 2000 estimates base |
Year-to-year changes across 2010 and 2020 mix census counts with estimates, so small jumps at those years are partly method changes.
Frequently asked questions
What is the population of Rancho Cucamonga in 2025?
The Census Bureau estimates Rancho Cucamonga had 177,856 residents on July 1, 2025, making it the 156th-largest city in the US.
Is Rancho Cucamonga growing?
Yes. Rancho Cucamonga has grown 7.6% since the 2010 Census (165,269 people), and grown 1.9% since 2020.
What was the population of Rancho Cucamonga in 2000?
About 127,755 (the Census Bureau's April 2000 estimates base). By the 2010 Census it was 165,269.
How dense is Rancho Cucamonga?
Rancho Cucamonga has about 3,824 people per square mile of land (46.5 square miles).
More about Rancho Cucamonga
See cost of living, jobs and commutes in Rancho Cucamonga, Rancho Cucamonga weather by month, or every Rancho Cucamonga ZIP code. For the biggest cities in the country, see the largest US cities.