Postal Codes

83605 ZIP Code

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ZIP code 83605 covers Caldwell, Idaho, with a population of about 41,155 and a median household income of $60,657.

Population
41,1551,671 per square mile
Median age
31.96.8 points below the US average
Median household income
$60,65719% below the Idaho median
Poverty rate
14.5%2.1 points above the US average
Typical home value
$375,707up 3.1% in five years
Median rent
$97315% below the Idaho median
Degree or higher
14.1%20.9 points below the US average
Homeownership
67.2%2.2 points above the US average
Time zone
Mountain UTC-07:00observes daylight saving time
Businesses
1,102

Where 83605 is

Caldwell, Idaho — the area the Census Bureau draws for this ZIP code. ZIP codes are sets of delivery routes rather than areas, so this is the Census approximation of one, not a Postal Service boundary.

People and households

American Community Survey 2019–2023 five-year estimates

Population41,155
Median age31.9
Family households68.1%
Born outside the US13.5%
Speaks a language other than English at home29.2%
White (non-Hispanic)50.8%
Black (non-Hispanic)0.5%
Asian (non-Hispanic)0.9%
Hispanic or Latino42.4%
Veterans7.7%
Population by age
MaleFemale0-45-910-1415-1920-2425-3435-4445-5455-6465-7475-8485+
Income and poverty

American Community Survey 2019–2023 five-year estimates

Median household income$60,657
Income per person$23,488
Poverty rate14.5%
Households on SNAP or cash assistance17.4%

Household income distribution

Under $10k4.0%
$10–15k4.3%
$15–20k5.3%
$20–25k5.8%
$25–30k5.2%
$30–35k3.3%
$35–40k4.7%
$40–45k4.9%
$45–50k4.5%
$50–60k7.5%
$60–75k14.3%
$75–100k14.2%
$100–125k10.9%
$125–150k6.3%
$150–200k3.0%
$200k or more1.7%

Income as declared to the IRS

Filed returns rather than survey responses, so this counts tax units and not households.

Tax returns filed17,070
Mean adjusted gross income$55,294
Returns declaring $200,000 or more1.6%
Returns, under $25k27.6%
Returns, $25k–$50k32.4%
Returns, $50k–$75k18.0%
Returns, $75k–$100k10.2%
Returns, $100k–$200k10.3%
Returns, $200k or more1.6%
Housing

American Community Survey 2019–2023 five-year estimates

Median home value$300,900
Median gross rent$973
Rent as a share of household income30.6%
Owner-occupied67.2%
Vacant homes4.7%
Median year built1987

What the homes are

Detached house71.8%
Attached house4.2%
2 to 4 units7.1%
5 to 19 units4.6%
20 or more units3.2%
Mobile home9.1%
Home values and rents today

Zillow Home Value Index and Zillow Observed Rent Index, courtesy of Zillow. Monthly and current, where the Census figures above are a five-year average and are capped at $2,000,000.

Typical home value$375,707as of 2026-07
Typical home value, 1 yearup 1%
Typical home value, 5 yearsup 3.1%
Typical home value, 10 yearsup 165.3%
Typical asking rent$1,504as of 2026-07
Typical asking rent, 1 yearup 5.4%
Typical asking rent, 5 yearsup 22.5%
Typical home value since 2000
200520152026$412,376$70,489

$100,220 in 2005 to $375,707 in 2026.

Typical asking rent
202120232026$1,504$1,228

$1,228 in 2021 to $1,504 in 2026.

Work, commuting and education

American Community Survey 2019–2023 five-year estimates

Unemployment rate5.2%
Bachelor's degree or higher14.1%
High school diploma or higher80.4%
Works from home10.3%
Drives to work alone73.1%
Takes public transport0.4%
Commutes 45 minutes or more10.6%
Health

CDC PLACES 2025 release, model-based estimates. These are modelled small-area estimates for adults, not counts of diagnosed cases.

Obesity37.5% 4.1 pts above the national average of 33.4%
Diagnosed diabetes12.7% 0.7 pts above the national average of 12%
Currently smokes14.3% 1.1 pts above the national average of 13.2%
High blood pressure31.7% 2.4 pts below the national average of 34.1%
Fair or poor general health23.9% 3.6 pts above the national average of 20.3%
No health insurance (18–64)18.6% 7.3 pts above the national average of 11.3%
Depression23.5% 1.6 pts above the national average of 21.9%
No leisure-time physical activity29.9% 4.5 pts above the national average of 25.4%
Arthritis25.1% same as the national average of 25.1%
Binge drinking14.3% 1.7 pts below the national average of 16%
Taking blood pressure medication68.2% 6.5 pts below the national average of 74.7%
Cancer (non-skin)6.9% 0.8 pts below the national average of 7.7%
Current asthma11.1% 0.7 pts above the national average of 10.4%
Coronary heart disease6.4% same as the national average of 6.2%
Routine check-up in past year71.2% 5.5 pts below the national average of 76.7%
Cholesterol screening77.3% 8.6 pts below the national average of 85.9%
Cognitive disability20.5% 5.7 pts above the national average of 14.8%
Colorectal screening55.5% 8.8 pts below the national average of 64.3%
COPD7.7% 1.1 pts above the national average of 6.6%
Visited a dentist57.7% 3.6 pts below the national average of 61.3%
Any disability42.3% 11.6 pts above the national average of 30.7%
Lacks emotional support21.9% 2.9 pts below the national average of 24.8%
Food insecurity20.8% 3.7 pts above the national average of 17.1%
Received food stamps15% 0.7 pts above the national average of 14.3%
Hearing disability10% 3.3 pts above the national average of 6.7%
High cholesterol34.2% 2 pts below the national average of 36.2%
Housing insecurity15.6% 1.8 pts above the national average of 13.8%
Independent living disability10.5% 2.1 pts above the national average of 8.4%
Lacks transport11.2% 2 pts above the national average of 9.2%
Loneliness30.7% 3.7 pts below the national average of 34.4%
Mammography use59.4% 16.5 pts below the national average of 75.9%
Poor mental health (14+ days)18% 1.2 pts above the national average of 16.8%
Mobility disability17.8% 3.8 pts above the national average of 14%
Poor physical health (14+ days)16.1% 2.6 pts above the national average of 13.5%
Self-care disability4.8% 0.8 pts above the national average of 4%
Utility shut-off threat10.1% 1.3 pts above the national average of 8.8%
Sleeps under 7 hours36.4% same as the national average of 36.4%
Stroke3.6% same as the national average of 3.4%
All natural teeth lost20.7% 7.7 pts above the national average of 13%
Vision disability7.2% 1.6 pts above the national average of 5.6%
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Business and employment

Census ZIP Code Business Patterns 2022

Business establishments1,102
People employed15,945
Annual payroll$728,425,000
Natural hazard risk

FEMA National Risk Index, estimated for this ZIP code from census tract data — the NRI is not published per ZIP.

Overall riskHigher than 17% of US census tracts
FEMA ratingVery Low to Relatively Low across the 13 census tracts this ZIP code covers
Expected annual loss19.6 out of 100
Community resilience32.6 out of 100

By hazard

Score is out of 100 and is the area-weighted average across the census tracts this ZIP code covers. The rating beside it is the highest any one of those tracts carries.

Winter weather93.4Very High at its worst in this ZIP code
Volcanic activity75.2Very Low at its worst in this ZIP code
Wildfire70.6Relatively Moderate at its worst in this ZIP code
Lightning70.4Relatively High at its worst in this ZIP code
Heat wave68.3Relatively Moderate at its worst in this ZIP code
Drought67.5Very Low at its worst in this ZIP code
Ice storm58.5Relatively Moderate at its worst in this ZIP code
Strong wind57.7Relatively Moderate at its worst in this ZIP code
Earthquake51.8Relatively Low at its worst in this ZIP code
Hail43.6Relatively Low at its worst in this ZIP code
River flooding34.7Relatively Moderate at its worst in this ZIP code
Landslide23.6Very Low at its worst in this ZIP code
Cold wave23.2Relatively Low at its worst in this ZIP code
Tornado14.5Very Low at its worst in this ZIP code
Compared with Idaho and the United States

State and national columns are figures for those areas, not for this ZIP code. American Community Survey 2019–2023 five-year estimates

This ZIPIdahoUnited States
Median household income$60,657$74,636$78,538
Income per person$23,488$37,169$43,289
Poverty rate14.5%10.6%12.4%
Median home value$300,900$376,000$303,400
Median gross rent$973$1,150$1,348
Homeownership67.2%72.4%65%
Bachelor's degree or higher14.1%31.2%35%
Unemployment rate5.2%3.7%5.2%
Works from home10.3%12.2%13.5%
Born outside the US13.5%5.7%13.9%
Median age31.937.138.7
Climate

NOAA US Climate Normals 1991-2020, from the nearest weather station with a full year of records. The station and its distance are named above, because a station forty kilometres away describes somewhere else.

Weather stationDEER FLAT DAM, ID US10.3 km away
Rain in a year10 in

Average high and low by month

January39.8°F / 24.5°F1.22 in rain
February47.4°F / 27.3°F0.99 in rain
March58.4°F / 33.8°F1.1 in rain
April64.5°F / 38.4°F1.06 in rain
May73.1°F / 46°F1.15 in rain
June80.9°F / 52.1°F0.7 in rain
July89.9°F / 59.2°F0.29 in rain
August89.1°F / 57°F0.19 in rain
September80°F / 49°F0.37 in rain
October66.4°F / 39.2°F0.75 in rain
November50.3°F / 30.5°F1.07 in rain
December40.1°F / 24°F1.11 in rain
Access to food

USDA Food Access Research Atlas, estimated for this ZIP code from census tract data. Each figure is the share of the ZIP code's land area that falls in a tract carrying that flag.

Low income and far from a supermarket23% of this ZIP code's area
Far from a supermarket23% of this ZIP code's area
No vehicle and far from a supermarket74% of this ZIP code's area
School districts

NCES Geographic Relationship File 2025, which states the association between each district and each ZIP code tabulation area directly. Elementary and secondary districts can cover the same ground, so shares need not total 100%.

This ZIP code is served by 2 school districts, so the address decides which one, not the ZIP code.

Caldwell School District 13254% of this ZIP code's land area
Vallivue School District 13945.7% of this ZIP code's land area
Community and walkability

CDC/ATSDR Social Vulnerability Index 2022 and the EPA National Walkability Index, both estimated for this ZIP code from census tract data. Vulnerability figures are national percentile ranks, not measurements.

Overall social vulnerability58more vulnerable than 58% of US census tracts
Socioeconomic status61more vulnerable than 61% of US census tracts
Household characteristics61more vulnerable than 61% of US census tracts
Racial and ethnic minority status53more vulnerable than 53% of US census tracts
Housing type and transport48more vulnerable than 48% of US census tracts
Walkability11.1 out of 20Above average
Nearby ZIP codes

The closest ZIP codes by centre point, which is not the same as sharing a border.

83607 Caldwell, ID6.3 km away
83652 Nampa, ID8.1 km away
83644 Middleton, ID9.5 km away
83653 Nampa, ID9.6 km away
83630 Huston, ID9.9 km away
83606 Caldwell, ID10.5 km away
83626 Greenleaf, ID10.6 km away
83656 Notus, ID10.7 km away
Location, counties and time zone

County shares from Census 2020 ZCTA relationship files. Time zone from the USDOT National Transportation Atlas, which renders the boundaries written into 49 CFR Part 71.

Canyon County100% of this ZIP code's land area
Time zoneMountain (UTC-07:00 standard)
Daylight saving timeObserved
Land area24.63 sq mi
Water area0.26 sq mi
Population density1,671 people per sq mi
Latitude, longitude43.6627, -116.7000

Figures are published for this ZIP code or its Census tabulation area unless a section says otherwise. Estimates whose margin of error made them unreliable are omitted rather than shown. Sources: US Census Bureau, CDC, IRS.

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