ZIP Codes in Idaho
Idaho's ZIP codes cover a state that has become one of the fastest-growing in the country over the past decade, anchored by the booming Boise metro area in the southwest, with a distinctly different Idaho Panhandle in the north and a rural, agricultural stretch across the Snake River Plain in between. With around 2 million residents, Idaho remains one of the more sparsely populated states overall, even as Boise's growth has drawn national attention.
How ZIP Codes Are Organized Across the State
Idaho's ZIP codes fall within the 83200–83899 range under the USPS system. Boise and the Treasure Valley occupy the lower end around 837xx, Idaho Falls and eastern Idaho sit near 834xx, and the Idaho Panhandle in the north - including Coeur d'Alene - carries codes closer to 838xx, reflecting its geographic and cultural separation from the rest of the state.
Idaho's Major Metro Areas by Population
The chart below shows just how dominant the Boise metro area has become within Idaho's overall population, especially given its rapid growth in recent years.
Boise's ZIP codes cover Idaho's capital and by far its largest city, which has seen a huge influx of new residents in recent years, many relocating from higher-cost West Coast states. Meridian and Nampa, both part of the greater Treasure Valley alongside Boise, have grown just as quickly, with new residential development pushing ZIP code boundaries outward almost every year. For a broader comparison of how Idaho's numbering fits into the national system, our full US ZIP code directory covers every state side by side.
The Idaho Panhandle
Northern Idaho's panhandle region, anchored by Coeur d'Alene, feels geographically and culturally distinct from the rest of the state - closer in many ways to eastern Washington than to Boise, which sits several hours south. ZIP codes here cover a landscape of lakes, forests, and mountains that draws significant tourism, alongside a growing number of new residents relocating from nearby Spokane just across the state line.
Eastern Idaho and the Snake River Plain
Eastern Idaho, including Idaho Falls, sits along the Snake River Plain and carries a strong connection to agriculture - Idaho is famously the country's largest producer of potatoes, much of it grown in this region. This area also borders Wyoming near Yellowstone National Park, and ZIP codes close to the border see a meaningful seasonal tourism bump from travelers passing through en route to the park.
Why ZIP Codes Matter Beyond Mail
In Idaho, ZIP codes have taken on new importance as Boise's rapid growth reshapes the local real estate market - boundaries that once separated modest suburbs now mark some of the most competitive housing markets in the country. Agricultural businesses in eastern Idaho use ZIP-level data to coordinate potato and grain shipping logistics. And tourism operators near the Panhandle lakes and the Wyoming border rely on ZIP codes to define service areas for outdoor recreation businesses.
Border Regions and Neighboring States
Idaho shares borders with six states, an unusually high number for its population size. To the west, the border with Washington and Oregon connects the Panhandle and the Boise area to the broader Pacific Northwest. To the east, the line with Wyoming and Montana runs through mountainous, sparsely populated terrain near Yellowstone. And to the south, the border with Utah and Nevada gives way to high desert country.
Finding the Right ZIP Code
Use the list below to browse Idaho's ZIP codes by city, county, or population - sorted so the most populous areas surface first. Each entry links through to a detailed page with additional demographic data. If you're trying to identify the ZIP code for a specific address rather than browsing by city, the search tool at the top of this page will get you there faster than scrolling through the full list.
Frequently Asked Questions
How many ZIP codes does Idaho have?
Idaho has a few hundred ZIP codes, heavily concentrated around the fast-growing Boise metro area, with far fewer covering the state's rural and mountainous regions.
What ZIP code range does Idaho use?
Idaho ZIP codes generally fall between 83200 and 83899, with Boise toward the lower end and the Panhandle further along the range.
Why is Boise growing so quickly?
Boise has drawn significant migration in recent years from higher-cost West Coast states, driven by relative affordability, outdoor recreation access, and a growing tech and business sector.
Can I look up an Idaho ZIP code by city name?
Yes, use the search tool on this page or browse the full list below, which is organized by city and sorted by population.
Whether you're relocating to the booming Boise area, researching property in the Panhandle near Coeur d'Alene, or simply trying to pin down the right ZIP code for a specific Idaho address, the data below covers every corner of the state.