Residential delivery area · Idaho
ZIP Code 83605: Caldwell, ID
ZIP code 83605 is in Caldwell, Idaho, entirely in Canyon County (Census 2020 ZIP-county file). About 41,000 people live there (Census Bureau, ACS 2020-2024), the more populous of Caldwell's 2 residential ZIP codes. Median household income is $68,427 (Census Bureau, ACS 2020-2024). By Census place, 61% of its land lies in Caldwell, and under 1% in smaller places; 38% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Caldwell · 2 residential ZIPs
- County
- Canyon County
- Census places
- Caldwell
- Metro area
- Boise City, ID
- House district
- ID-1 119th Congress
- State
- Idaho
- Time zone
- Mountain
- Land area
- 24.6 sq mi · 1,678 people per sq mi
- PO Box ZIPs
- 83606 also use the name Caldwell
Where is ZIP code 83605?
83605 centers on 43.664°, -116.652° and covers 24.6 square miles of land plus 0.3 of water. It borders 3 ZIP codes: 83607, 83644, 83687.
The map draws ZIP code areas only. For the streets inside 83605, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 83605 compare with the rest of Caldwell?
| Measure | 83605 | In Caldwell | In Canyon County | In ID |
|---|---|---|---|---|
| People (ACS 2020-2024) | 41,325 | 1st of 2 | 3rd of 13 | 12th of 279 |
| Median household income | $68k | 2nd of 2 | 9th of 11 | 83rd of 126 |
| Median home value | $346k | 2nd of 2 | 11th of 12 | 76th of 138 |
Its median household income is higher than in 44% of U.S. residential ZIP codes, and it is denser than 83% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 83605?
The 2020 Census counted 38,561 people in 83605; the ACS, which samples households over 2020-2024, estimates 41,325. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 41,325
- 2020 Census count
- 38,561
- Households
- 13,709
- Median age
- 32.4
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 83605?
Of the 41,325 people the ACS estimates in 83605, 27.6% are under 18 and 11.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (50.8%), then Hispanic or Latino (42.0%).
- Under 1827.6%
- 18 to 6461.2%
- 65 and older11.2%
- White, not Hispanic50.8%
- Hispanic or Latino42.0%
- Other or two or more6.0%
- Asian, not Hispanic0.9%
- Black, not Hispanic0.4%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 83605 earn?
Median household income is $68,427 (ACS 2020-2024), the 9th highest of the 11 ranked ZIP codes in Canyon County.
- Median household income
- $68,427
- Income per person
- $25,866
- Below the poverty line
- 12.4%
- Unemployed (of the labor force)
- 6.1%
- Adults 25+ with a bachelor's degree
- 15.1%
- Adjusted gross income per tax return, 2022
- $55,29417,070 returns; wages 76% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 83605?
FHFA's house price index for 83605, built from repeat sales and appraisals of the same homes, rose 204% from 2015 to 2025 and rose 53% from 2020 to 2025, and moved +2.6% in 2025.
- Median home value (owners' estimate)
- $346,100
- Median gross rent
- $1,124
- Homes owned by their occupants
- 69.2%
- Housing units
- 14,391
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 83605?
1,140 business establishments had a location in this ZIP code in 2023, 260 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction316
- Health care and social assistance119
- Retail trade106
- Accommodation and food services89
- Other services (except public administration)85
- Manufacturing74
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 83605?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 83607 | Caldwell | 35,491 | $85k | 5.3 mi |
| 83644 | Middleton | 16,293 | $97k | 6.7 mi |
| 83687 | Nampa | 43,135 | $77k | 7.2 mi |
| 83651 | Nampa | 38,121 | $70k | 5.5 mi (near) |
| 83656 | Notus | 560 | $65k | 8.3 mi (near) |
| 83626 | Greenleaf | 1,935 | $70k | 8.7 mi (near) |
| 83669 | Star | 16,827 | $100k | 9.2 mi (near) |
| 83646 | Meridian | 76,023 | $103k | 11.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.