El Cajon population
El Cajon, California had an estimated 101,755 residents on July 1, 2025, the 347th-largest city in the US. That is up 2.3% since the 2010 Census and up 7.2% since 2000.
- Population, July 2025
- 101,755-4.2% since April 2020
- People per sq mile
- 7,01314.5 sq mi of land
- Median age
- 36.114.5% are 65 or older
- Households with kids
- 37.6%with anyone under 18
Population by year, 2000 to 2025
| Year | Population | Change | Basis |
|---|---|---|---|
| 2025 | 101,755 | -1,086 | Estimate, July 1 |
| 2024 | 102,841 | -530 | Estimate, July 1 |
| 2023 | 103,371 | -702 | Estimate, July 1 |
| 2022 | 104,073 | -1,025 | Estimate, July 1 |
| 2021 | 105,098 | -1,082 | Estimate, July 1 |
| 2020 | 106,180 | +3,214 | April 2020 estimates base |
| 2019 | 102,966 | -434 | Estimate, July 1 |
| 2018 | 103,400 | -355 | Estimate, July 1 |
| 2017 | 103,755 | -33 | Estimate, July 1 |
| 2016 | 103,788 | +401 | Estimate, July 1 |
| 2015 | 103,387 | +497 | Estimate, July 1 |
| 2014 | 102,890 | +601 | Estimate, July 1 |
| 2013 | 102,289 | +756 | Estimate, July 1 |
| 2012 | 101,533 | +837 | Estimate, July 1 |
| 2011 | 100,696 | +1,218 | Estimate, July 1 |
| 2010 | 99,478 | +764 | 2010 Census (April 1) |
| 2009 | 98,714 | +834 | Estimate, July 1 |
| 2008 | 97,880 | +1,027 | Estimate, July 1 |
| 2007 | 96,853 | +479 | Estimate, July 1 |
| 2006 | 96,374 | -176 | Estimate, July 1 |
| 2005 | 96,550 | -234 | Estimate, July 1 |
| 2004 | 96,784 | +105 | Estimate, July 1 |
| 2003 | 96,679 | -52 | Estimate, July 1 |
| 2002 | 96,731 | +525 | Estimate, July 1 |
| 2001 | 96,206 | +1,299 | Estimate, July 1 |
| 2000 | 94,907 | 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 El Cajon in 2025?
The Census Bureau estimates El Cajon had 101,755 residents on July 1, 2025, making it the 347th-largest city in the US.
Is El Cajon growing?
Yes. El Cajon has grown 2.3% since the 2010 Census (99,478 people), and shrunk 4.2% since 2020.
What was the population of El Cajon in 2000?
About 94,907 (the Census Bureau's April 2000 estimates base). By the 2010 Census it was 99,478.
How dense is El Cajon?
El Cajon has about 7,013 people per square mile of land (14.5 square miles).
More about El Cajon
See cost of living, jobs and commutes in El Cajon, El Cajon weather by month, or every El Cajon ZIP code. For the biggest cities in the country, see the largest US cities.