ZIP codes

ZIP codes in Ada County, Idaho

Ada County has 19 ZIP codes. 12 lie entirely inside it and 7 are shared with neighboring counties, so part of their land and their people are elsewhere. About 517,118 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 19; With 1% or more of their land inside
Entirely inside: 12; 99% or more of their land
Shared with other counties: 7; Most with Canyon County (4)
Most populated ZIP: 83646; 76,023 people · Meridian
Least populated ZIP: 83712; 9,071 people · Boise City; 2 more with nobody living there
Largest ZIP by land: 83634; 156 sq mi · Kuna

Map of the ZIP codes in Ada County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Ada County

19 ZIP codes in Ada County, ID, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
83616	Eagle	35,413	64%	≈ 34,973
83634	Kuna	36,286	95%	≈ 34,945
83641	Melba	4,061	14%	≈ 975
83642	Meridian	62,279	100%	62,279
83646	Meridian	76,023	100%	76,023
83669	Star	16,827	66%	≈ 15,408
83687	Nampa	43,135	10%	≈ 2,791
83702	Boise City	24,163	97%	≈ 24,158
83703	Boise City	17,583	100%	17,583
83704	Boise City	42,719	100%	42,719
83705	Boise City	26,830	100%	26,830
83706	Boise City	35,524	100%	35,524
83709	Boise City	58,928	100%	58,928
83712	Boise City	9,071	100%	9,071
83713	Boise City	31,549	100%	31,549
83714	Garden City	27,564	100%	27,564
83716	Robie Creek	21,402	16%	≈ 15,798
83720	Boise City	0	100%	0
83725	Boise City	0	100%	0

ZIP codes shared with other counties

These 7 ZIP codes have part of their land in another county. The first figure is the share of their land in Ada County; then, where the rest lies.

83616 (Eagle): 64% here; 36% in Gem County.
83634 (Kuna): 95% here; 4.9% in Canyon County.
83641 (Melba): 14% here; 61% in Owyhee County and 25% in Canyon County.
83669 (Star): 66% here; 34% in Canyon County.
83687 (Nampa): 10% here; 90% in Canyon County.
83702 (Boise City): 97% here; 2.7% in Boise County.
83716 (Robie Creek): 16% here; 61% in Elmore County and 24% in Boise County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Boise City (10), Meridian (2), Eagle (1), Garden City (1), Kuna (1), and Melba (1); 9 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 836 and 837.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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