ZIP codes

ZIP codes in Allen County, Indiana

Allen County has 33 ZIP codes. 21 lie entirely inside it and 12 are shared with neighboring counties, so part of their land and their people are elsewhere. About 396,318 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 33; With 1% or more of their land inside
Entirely inside: 21; 99% or more of their land
Shared with other counties: 12; Most with Wells County (4)
Most populated ZIP: 46835; 38,166 people · Fort Wayne
Least populated ZIP: 46704; 70 people
Largest ZIP by land: 46773; 79 sq mi · Monroeville

Map of the ZIP codes in Allen 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 Allen County

33 ZIP codes in Allen County, IN, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
46704	—	70	100%	70
46706	Auburn	20,403	3.6%	≈ 1,375
46723	Churubusco	7,617	37%	≈ 2,746
46733	Decatur	19,318	2.9%	≈ 452
46741	Harlan	4,713	100%	4,713
46743	Harlan	2,347	100%	2,347
46745	Hoagland	1,793	100%	1,793
46748	Huntertown	6,902	93%	≈ 6,804
46765	Leo-Cedarville	5,786	100%	5,786
46773	Monroeville	3,474	94%	≈ 3,223
46774	New Haven	17,858	100%	17,858
46777	Ossian	6,081	4.9%	≈ 329
46783	Roanoke	7,764	33%	≈ 4,518
46788	Leo-Cedarville	4,373	47%	≈ 3,059
46797	Woodburn	4,097	100%	4,097
46798	—	954	97%	≈ 918
46799	Zanesville	375	39%	≈ 225
46802	Fort Wayne	11,177	100%	11,177
46803	Fort Wayne	10,994	100%	10,994
46804	Fort Wayne	29,661	100%	29,661
46805	Fort Wayne	21,437	100%	21,437
46806	Fort Wayne	26,425	100%	26,425
46807	Fort Wayne	16,317	100%	16,317
46808	Fort Wayne	19,684	100%	19,684
46809	Fort Wayne	8,589	100%	8,589
46814	Fort Wayne	16,778	88%	≈ 16,665
46815	Fort Wayne	27,238	100%	27,238
46816	Fort Wayne	19,514	100%	19,514
46818	Fort Wayne	21,954	98%	≈ 21,890
46819	Fort Wayne	9,369	100%	9,369
46825	Fort Wayne	29,296	100%	29,296
46835	Fort Wayne	38,166	100%	38,166
46845	Fort Wayne	29,583	100%	29,583

ZIP codes shared with other counties

These 12 ZIP codes have part of their land in another county. The first figure is the share of their land in Allen County; then, where the rest lies.

46706 (Auburn): 3.6% here; 96% in DeKalb County.
46723 (Churubusco): 37% here; 40% in Whitley County and 23% in Noble County.
46733 (Decatur): 2.9% here; 97% in Adams County.
46748 (Huntertown): 93% here; 4.6% in Noble County and 2.7% in DeKalb County.
46773 (Monroeville): 94% here; 6.0% in Adams County.
46777 (Ossian): 4.9% here; 92% in Wells County and 2.8% in Adams County.
46783 (Roanoke): 33% here; 46% in Huntington County, 20% in Whitley County, and 1.9% in Wells County.
46788 (Leo-Cedarville): 47% here; 53% in DeKalb County.
46798: 97% here; 3.2% in Wells County.
46799 (Zanesville): 39% here; 61% in Wells County.
46814 (Fort Wayne): 88% here; 12% in Whitley County.
46818 (Fort Wayne): 98% here; 1.9% in Whitley 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 Fort Wayne (16), Harlan (2), Leo-Cedarville (2), Auburn (1), Churubusco (1), and Decatur (1); 14 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 467 and 468.

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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