10 Most Populated ZIP Codes in Idaho

The top ZIP code for population in Idaho is 83301 (Twin Falls, Twin Falls County), with a population of 61,968. Across the top 10 most populated ZIP codes in Idaho, population ranges from 61,968 to 40,299, covering communities from Twin Falls to Post Falls.

Rank	ZIP	City	County	Population	Population
1	83301	Twin Falls	Twin Falls County	61,968	61,968
2	83686	Nampa	Canyon County	59,532	59,532
3	83709	Boise	Ada County	58,631	58,631
4	83642	Meridian	Ada County	58,049	58,049
5	83854	Post Falls	Kootenai County	53,152	53,152
6	83440	Rexburg	Madison County	50,669	50,669
7	83401	Idaho Falls	Bonneville County	47,170	47,170
8	83704	Boise	Ada County	41,406	41,406
9	83605	Caldwell	Canyon County	41,155	41,155
10	83687	Nampa	Canyon County	40,299	40,299

Methodology

Rankings are derived from the U.S. Census Bureau American Community Survey 5-Year Estimates, vintage 2019 to 2023, joined to USPS ZIP Code Tabulation Areas. We rank by population and surface the top 10 ZIP codes within Idaho. Values reflect ZCTA-level estimates and may differ slightly from city-level figures. Compiled and reviewed by the Zip Code Near Me Data Team.

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Reviewed by Zip Code Near Me Data Team. Last verified June 13, 2026.

10 Most Populated ZIP Codes in Idaho

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