Ada County, ID Zip Code Map

Overview of Ada County and Boise ZIP Codes

Ada County, Idaho, is the state's most populous county and the heart of the Treasure Valley. Anchored by the state capital, Boise, the county features a rapidly expanding ZIP Code system that serves high-growth suburban neighborhoods, a dense urban core, and rural agricultural corridors. The county includes approximately 41 total ZIP Codes, including standard residential areas, specialized PO Box hubs for state government, and unique institutional codes.

• Total ZIP Codes: 41
• Standard residential ZIP Codes: 22
• PO Box ZIP Codes: 14
• Unique / business ZIP Codes: 5 (e.g., Boise State University, Micron Technology)
• Census ZIP Code Tabulation Areas (ZCTAs): 16

ZIP Code Range in Ada County

Ada County ZIP Codes fall within the "836" (Suburban/Rural) and "837" (Boise/Garden City) prefixes:

• Lowest ZIP Code: 83616 (Eagle)
• Highest ZIP Code: 83799 (Boise - PO Box)
• Highest Residential ZIP Code: 83716 (Southeast Boise)
• Overall ZIP range: 83616–83799

Post Offices and PO Box ZIP Codes

• PO Box ZIP Codes: 14 PO Box-only ZIP Codes (e.g., 83701 Main Office, 83707, 83680 Meridian)
• Post office facilities: Over 15 USPS retail locations, including major processing hubs in Boise and Meridian.
• PO Box locations: Primary concentrations are found in Downtown Boise (83701/83702) and the Meridian Main Station (83680).

Cities, Towns, and Communities Covered by Ada County ZIP Codes

Ada County ZIP Codes serve the state's largest cities and several rapidly growing unincorporated communities.

Boise & Garden City (837xx Series)

• Downtown & North End (83702, 83712)
• West Boise & Garden City (83704, 83713, 83714)
• Southeast Boise & Harris Ranch (83706, 83716)
• Southwest Boise & The Bench (83705, 83709)

Suburban & Rural Areas (836xx Series)

• Growth Hubs: Meridian (83642, 83646), Eagle (83616)
• Rural/Residential: Kuna (83634), Star (83669)
• Unincorporated Communities: Hidden Springs (83703), Avimor

ZIP Code Population Patterns

Ada County is home to the most populous ZIP codes in Idaho, with growth moving aggressively into the western suburbs.

• Most populated ZIP Code areas: Meridian's 83646 is the state's most populous ZIP code with over 74,000 residents, followed by Southwest Boise's 83709 (approx. 58,000 residents).
• Growth Trends: The "836" series (Meridian/Kuna/Star) has seen the highest percentage increase in residential housing units over the last decade.

Key ZIP Code Statistics (Summary)

*Note: Statistics are based on 2024-2026 Census and USPS classification data. 83616 (Eagle) consistently ranks as the highest-income ZIP code in the region.

List of ZIP Codes in Ada County, ID