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Idaho ZIP codes

Idaho has 320 ZIP codes (83201–83877) across 266 cities and towns and 44 counties.

ZIP codes
320
With delivery area
279
Population in ZIPs
1,933,906
Cities & towns
266
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Richest ZIP codes in Idaho Most expensive ZIP codes

Zoom in to see ZIP code boundaries. Click a dot to open a ZIP code, or anywhere else to see which ZIP it's in.

Largest cities in Idaho

Idaho ZIP codes by county

Most populated Idaho ZIP codes

  1. 83646 Meridian – 76,023
  2. 83301 Twin Falls – 63,592
  3. 83642 Meridian – 62,279
  4. 83686 Nampa – 60,993
  5. 83709 Boise – 58,928
  6. 83854 Post Falls – 54,851
  7. 83440 Rexburg – 51,421
  8. 83401 Idaho Falls – 47,972
  9. 83687 Nampa – 43,135
  10. 83704 Boise – 42,719

All Idaho cities and towns

Frequently asked questions

How many ZIP codes are in Idaho?

Idaho has 320 ZIP codes: 279 with a delivery area and 41 PO Box or single-organization ZIP codes.

What ZIP codes does Idaho use?

Idaho ZIP codes run from 83201 to 83877.

Which Idaho ZIP code has the most people?

ZIP code 83646 in Meridian has the largest population, about 76,023 residents (ACS 2020–2024).