Caldwell, Idaho

Caldwell population, 2020 to 2024

Caldwell added 12,345 residents from July 2020 to July 2024, a change of +20.3%. In the latest year it moved by +4,380. Among 36 Idaho places of 5,000 or more, that growth ranks 4th; the median place changed by +8.3%. The median place of 5,000+ in Idaho has 16,745 people, so Caldwell is 4.4 times that size.

Caldwell covers 25.13 square miles of land and 0.09 of water, for 2,908 people per square mile of land. The median Idaho place of 5,000+ has 2,389, so Caldwell is denser than the typical town.

What county Caldwell is in

All of Caldwell's residents live in Canyon County, which had 266,892 residents in 2024. Caldwell holds 27.4% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Caldwell

2 ZIP Code Tabulation Areas (ZCTAs) overlap Caldwell by at least 10% of the ZCTA's or the city's land: 83605, 83607. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Caldwell is

The Census internal point of Caldwell is at 43.645900, -116.659300. Boise, the capital, is 22.3 miles E in a straight line. The nearest larger place is Nampa, ID (117,350 people), 6.4 miles away.

Daylight in Caldwell

At 43.65° N, Caldwell gets about 15 h 27 min of daylight around the June solstice and 8 h 56 min around the December solstice, a swing of 6 h 31 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Caldwell

The eight nearest incorporated places of 1,000+ in Idaho, measured between internal points. The closest is Middleton, 4.9 miles away, with 11,730 people.