With 66,516 people, Caldwell is a city in Idaho. Since 2000 the city has more than doubled, up 40,549 people. The median age is 31.5, younger than the US median of 38.9. 20% of adults hold a bachelor's degree, below the 36% national rate. Density works out to 2,829 people per square mile. Owners hold 73% of the housing stock.
At a glance
Lower income
median household income $73,058, below the US median
US median: $82,259
Younger
median age 31.5
US median: 38.9
Less educated
20% hold a bachelor's degree
US average: 36%
Less affordable
home values up 148%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Caldwell
What changed most since 1990
Population18,400 → 66,516(+262%)US over the same years: +35%
Median home value (2024 dollars)$113,523 → $367,300(+224%)US over the same years: +67%
Homes owned by their occupants61.8% → 73.0%(+11.3 pts)US over the same years: +0.9 pts
Caldwell's population equals 27% of Canyon County's. Its number of residents 65 and older equals 18% of the county's. Its number of foreign-born residents equals 38% of the county's.
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)37.5%(1,268)
US avg: 26.4%
Gulf War (1990s)25.8%(872)
US avg: 24.3%
Vietnam era21%(710)
US avg: 33.1%
Korean War1.9%(66)
US avg: 4.5%
World War II0.7%(25)
US avg: 1%
Share of the 3,385 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Caldwell, decade by decade
Caldwell population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
18,400
$49,996
$113,523
12.6%
43.2
2000
25,967
$56,194
$148,283
11.7%
56.6
2010
46,237
$53,710
$181,835
12.3%
63.2
2020
59,996
$66,746
$228,227
15.5%
68.5
2024
66,516
$73,058
$367,300
19.5%
68.5
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
