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zipcodes.pro — STATE/OH/COUNTY/ALLEN

Allen County, OH ZIP codes

There are 14 ZIP codes in Allen County, OH, in 9 towns, from 45801 to 45887. The largest are 45805 (Lima), 45801 (Lima) and 45804 (Lima). 1 more crosses into it from a neighbouring county: 45830.

The county seat is Lima.

ZIP codes
14
Partly in it
1 more
Towns
9
County seat
Lima
County FIPS
39003
State
Ohio
Population
101,348
Median household income
$64,038
Land area
403 sq mi
Area codes
419, 567
Metro area
Lima

Allen County ZIP codes by town

Lima (county seat)
45801, 45802, 45804, 45805, 45806, 45807

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

ZIP codes partly in Allen County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Allen County.

Map of Allen County ZIP codes

4580145802458044580545806458074580845809458174582045833458504585445887

The ZIP codes of Allen County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Allen County in numbers

About 101,348 people live in Allen County, in 41,295 households, the 26th most populous of Ohio's 88 counties. The median household income is $64,038 a year, 10% below the Ohio median of $71,389 (US: $80,734). The median owner-occupied home is valued at $165,300 (23% below the Ohio median), and median gross rent is $922 a month. The median age is 39.7; 20.1% of adults 25 and over hold a bachelor's degree or higher (31.5% across Ohio); the average commute takes 19 minutes.

Population101,348Allen101,348
Households41,295Allen41,295
Median age39.7Allen39.7Ohio39.7US 38.9
Median household income$64,038Allen$64,038Ohio$71,389US $80,734
Median home value$165,300Allen$165,300Ohio$214,800US $332,700
Median gross rent$922Allen$922Ohio$1,034US $1,413
Bachelor's degree or higher20.1%Allen20.1%Ohio31.5%US 35.7%
Mean commute18.7 minAllen18.7 minOhio23.4 minUS 26.4 min
Population density252 / sq miAllen252 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Allen County

Largest towns in Allen County
TownZIP codesPopulation
Lima 6 35,010
Delphos 1 7,143
Bluffton 1 3,859
Spencerville 1 2,107
Cairo 1 581
Harrod 1 453
Beaverdam 1 404
Lafayette 1 293
Gomer 1 148

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Allen County.

Not sure you are in Allen County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Allen County, with figures

ZIP codes in Allen County
ZIP City Type Population Median income Median home
45801 Lima , OH Standard 21,739 $51,731 $123,900
45802 Lima , OH No street area — — —
45804 Lima , OH Standard 13,608 $44,911 $99,600
45805 Lima , OH Standard 24,387 $68,842 $160,600
45806 Lima , OH Standard 10,974 $82,587 $212,400
45807 Lima , OH Standard 11,774 $70,725 $203,900
45808 Beaverdam , OH Standard 350 $81,875 $100,700
45809 Gomer , OH Standard 45 — $154,200
45817 Bluffton , OH Standard 5,926 $76,848 $210,100
45820 Cairo , OH Standard 581 $83,125 $114,500
45833 Delphos , OH Standard 10,919 $65,000 $160,900
45850 Harrod , OH Standard 3,559 $84,886 $193,900
45854 Lafayette , OH Standard 293 $53,125 $121,300
45887 Spencerville , OH Standard 4,422 $68,409 $184,400

Cite this page

zipcodes.pro. “Allen County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/oh/county/allen

Underlying data is public domain or openly licensed — sources, vintages and licences.