State profile · ID
Idaho ZIP Codes
Demographics, income, and housing across every ZIP code in Idaho, benchmarked against all 50 states, DC and Puerto Rico.
- 277
- ZIP codes
- 1,566,941
- Population
- $73,128
- Avg ZIP income
- 44
- Counties
The verdict
Texas leads ZIP coverage at 1,935 ZCTAs (#1 of 52). That is not the income board: New Jersey's unweighted average ZIP household income is $121,992 (#1 of 52) on 595 ZCTAs. Idaho sits #42 of 52 by ZIP count at income #33.
- Texas
- ZIP-count #1 (1,935)
- New Jersey
- income #1 ($121,992)
- #42
- of 52 by ZIP count
- #33
- of 52 by avg income
ZIP-count and income are separate boards among 52 reporting states and territories. Income is the unweighted mean of each ZIP's ACS 2019–2023 median household income, so a rural code counts the same as a dense metro.
Mid-to-lower income with a contained ZIP set (277 codes · 44 counties). Average household income $73,128 and home value $379,035 should be read next to the largest city page, not as a national peer of mosaic states. Use the county RankBars to pick two markets, then compare ZIPs inside those counties.
The largest city, Boise (235,657), holds a moderate share (~15%) of state ZIP population. Expect a primary metro plus a long tail of mid-size markets: the top-cities chart and county RankBars both matter, and a two-ZIP compare inside vs outside Boise usually beats reading the state average alone.
Compact ZIP geography: the state page is closer to a directory than a mega-atlas. Prefer the largest city page and its primary ZIP over scanning every county, and keep the FAQ answers as the quick census totals.
Largest cities in Idaho
Top 10 cities by population in Idaho
Total resident population aggregated from every ZIP code the Census assigns to each city.
- Boise
Boise, ID
235,657 residents
- Nampa
Nampa, ID
104,532 residents
- Idaho Falls
Idaho Falls, ID
101,543 residents
- Meridian 84,106
Meridian, ID
84,106 residents
- Pocatello 78,008
Pocatello, ID
78,008 residents
- Caldwell 61,381
Caldwell, ID
61,381 residents
- Coeur D Alene 54,386
Coeur D Alene, ID
54,386 residents
- Twin Falls 52,010
Twin Falls, ID
52,010 residents
- Post Falls 37,245
Post Falls, ID
37,245 residents
- Rexburg 35,470
Rexburg, ID
35,470 residents
What this shows Boise leads, but several peers sit close enough that this top-10 chart is a shortlist, not a single-city story – compare two of those metros before trusting the state mean.
Counties in Idaho
Which cities have the most ZIPs in Idaho?
Side-by-side: Compare 83301 vs 83709 →
ZIP Codes in Idaho
More ID ZIP codes
Official Data Resources for Idaho
Compact ZIP geography: start at Census ACS for Idaho, then BLS wages for the labor-market side of the same small map.
Frequently Asked Questions
Is Idaho compact enough to browse ZIP by ZIP?
Yes – 277 codes and 44 counties put Idaho in compact geography. Prefer the largest city page and its primary ZIP; the roll-ups here are quick census totals, not a substitute for opening one urban and one thin-edge code.
Why is Idaho's average ZIP income a weak relocation signal by itself?
At $73,128, the state mean blends unlike county labor markets (homes average $379,035). Cost-of-living questions belong at county and ZIP scale: start from the most populous counties, then drop to a thin-edge ZIP to see whether the mean is a real center or a blend.
Which Idaho cities should I open first?
Start with Boise (235,657, ~15% of ZIP population), then one mid-size market from the largest-cities chart. A two-ZIP compare inside vs outside Boise usually beats reading the state average alone. Other large markets include Nampa, Idaho Falls, Meridian.
Take this with you
What to do with Idaho's numbers, next.
- See how Idaho compares to a neighboring state on the same Census fields Compare states
- Check where Idaho's ZIP codes rank nationally on income, education, or homeownership View national rankings
- Save a ZIP code to your shortlist to track alongside others you're considering View your shortlist
Figures describe 2019–2023 ACS 5-Year Estimates aggregated from ZIP Code Tabulation Areas (ZCTAs), Census Bureau approximations of USPS ZIP codes, not any single address.
Source: U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2019–2023); USPS ZIP Code Tabulation Areas via the HUD USPS Crosswalk.
Read our methodology to see how this data is sourced, computed, and verified.