Caldwell population
Caldwell, Idaho had an estimated 76,629 residents on July 1, 2025, the 515th-largest city in the US. That is up 65.7% since the 2010 Census and up 183.6% since 2000.
- Population, July 2025
- 76,629+27.4% since April 2020
- People per sq mile
- 3,04925.1 sq mi of land
- Median age
- 31.510% are 65 or older
- Households with kids
- 43%with anyone under 18
Population by year, 2000 to 2025
| Year | Population | Change | Basis |
|---|---|---|---|
| 2025 | 76,629 | +3,452 | Estimate, July 1 |
| 2024 | 73,177 | +4,484 | Estimate, July 1 |
| 2023 | 68,693 | +2,639 | Estimate, July 1 |
| 2022 | 66,054 | +2,138 | Estimate, July 1 |
| 2021 | 63,916 | +3,778 | Estimate, July 1 |
| 2020 | 60,138 | +1,503 | April 2020 estimates base |
| 2019 | 58,635 | +2,084 | Estimate, July 1 |
| 2018 | 56,551 | +1,768 | Estimate, July 1 |
| 2017 | 54,783 | +1,626 | Estimate, July 1 |
| 2016 | 53,157 | +1,586 | Estimate, July 1 |
| 2015 | 51,571 | +1,419 | Estimate, July 1 |
| 2014 | 50,152 | +1,164 | Estimate, July 1 |
| 2013 | 48,988 | +1,262 | Estimate, July 1 |
| 2012 | 47,726 | +440 | Estimate, July 1 |
| 2011 | 47,286 | +1,049 | Estimate, July 1 |
| 2010 | 46,237 | +785 | 2010 Census (April 1) |
| 2009 | 45,452 | +1,124 | Estimate, July 1 |
| 2008 | 44,328 | +1,882 | Estimate, July 1 |
| 2007 | 42,446 | +2,329 | Estimate, July 1 |
| 2006 | 40,117 | +2,503 | Estimate, July 1 |
| 2005 | 37,614 | +2,172 | Estimate, July 1 |
| 2004 | 35,442 | +1,921 | Estimate, July 1 |
| 2003 | 33,521 | +2,024 | Estimate, July 1 |
| 2002 | 31,497 | +1,973 | Estimate, July 1 |
| 2001 | 29,524 | +2,508 | Estimate, July 1 |
| 2000 | 27,016 | 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 Caldwell in 2025?
The Census Bureau estimates Caldwell had 76,629 residents on July 1, 2025, making it the 515th-largest city in the US.
Is Caldwell growing?
Yes. Caldwell has grown 65.7% since the 2010 Census (46,237 people), and grown 27.4% since 2020.
What was the population of Caldwell in 2000?
About 27,016 (the Census Bureau's April 2000 estimates base). By the 2010 Census it was 46,237.
How dense is Caldwell?
Caldwell has about 3,049 people per square mile of land (25.1 square miles).
More about Caldwell
See cost of living, jobs and commutes in Caldwell, Caldwell weather by month, or every Caldwell ZIP code. For the biggest cities in the country, see the largest US cities.