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Idaho Falls, a vibrant city in Eastern Idaho, boasts a complex postal landscape with seven distinct ZIP codes that serve its growing population of over 64,000 residents. Understanding these ZIP codes is crucial for residents, businesses, and visitors navigating this dynamic urban area.
The ZIP Code Breakdown of Idaho Falls

The city is served by multiple postal zones, each representing different geographical sections and serving unique community needs. Here’s a comprehensive overview of the ZIP codes in Idaho Falls:
| ZIP Code | Type | Population Served | Notable Areas |
|---|---|---|---|
| 83401 | Standard | 47,114 residents | Includes Ammon, Beachs Corner, Bone, Coltman |
| 83402 | Standard | 28,452 residents | Covers Eagle Rock area |
| 83404 | Standard | 25,491 residents | Residential and commercial zones |
| 83406 | Standard | 19,003 residents | Includes part of Ammon |
| 83403 | P.O. Box | 0 direct residents | Postal box services |
| 83405 | P.O. Box | 0 direct residents | Postal box services |
| 83415 | Unique | 0 direct residents | Assigned to Idaho National Lab, Scoville |

Understanding ZIP Code Variations

The diversity of ZIP codes in Idaho Falls reflects the city’s complex urban and suburban landscape. 83401 is the most populous ZIP code, serving nearly 40% of the city’s population and encompassing areas like Ammon and several smaller communities.
Geographical Insights

Each ZIP code represents more than just a postal designation. They provide insights into:
- Demographic distribution
- Residential and commercial zones
- Specific community boundaries
Practical Considerations for Residents

When mailing items or identifying your specific location in Idaho Falls, consider these key points:
- Verify your exact ZIP code based on your street address
- Use the most specific ZIP code for accurate mail delivery
- Recognize that some ZIP codes cover multiple small communities
🏠 Note: Always confirm your exact ZIP code with the local post office or through official USPS resources to ensure accurate mail routing.
How many ZIP codes are in Idaho Falls?

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Idaho Falls has 7 total ZIP codes: 4 standard, 2 P.O. Box, and 1 unique ZIP code assigned to specific entities like the Idaho National Lab.
Which ZIP code serves the most residents?

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ZIP code 83401 serves the largest population, with approximately 47,114 residents, representing about 39% of the city's population.
Are there any unique ZIP codes in Idaho Falls?

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Yes, ZIP code 83415 is a unique ZIP code primarily assigned to the Idaho National Lab and Scoville area.
The postal landscape of Idaho Falls continues to evolve, reflecting the city’s dynamic growth and diverse community needs. Understanding these ZIP codes helps residents, businesses, and visitors navigate this vibrant Eastern Idaho urban center with precision and ease.