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zipcodes.pro — STATE/OH/COUNTY/PUTNAM

Putnam County, OH ZIP codes

There are 14 ZIP codes in Putnam County, OH, in 14 towns, from 45815 to 45893. The largest are 45875 (Ottawa), 45830 (Columbus Grove) and 45856 (Leipsic).

The county seat is Ottawa.

ZIP codes
14
Towns
14
County seat
Ottawa
County FIPS
39137
State
Ohio
Population
34,314
Median household income
$84,928
Land area
483 sq mi

Putnam County ZIP codes by town

Ottawa (county seat)
45875

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.

Map of Putnam County ZIP codes

4581545827458304583145837458444584845853458564586445875458764587745893

The ZIP codes of Putnam 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.

Putnam County in numbers

About 34,314 people live in Putnam County, in 13,153 households, the 70th most populous of Ohio's 88 counties. The median household income is $84,928 a year, 19% above the Ohio median of $71,389 (US: $80,734). The median owner-occupied home is valued at $201,100 (6% below the Ohio median), and median gross rent is $855 a month. The median age is 40.6; 26.4% of adults 25 and over hold a bachelor's degree or higher (31.5% across Ohio); the average commute takes 22 minutes.

Population34,314Putnam34,314
Households13,153Putnam13,153
Median age40.6Putnam40.6Ohio39.7US 38.9
Median household income$84,928Putnam$84,928Ohio$71,389US $80,734
Median home value$201,100Putnam$201,100Ohio$214,800US $332,700
Median gross rent$855Putnam$855Ohio$1,034US $1,413
Bachelor's degree or higher26.4%Putnam26.4%Ohio31.5%US 35.7%
Mean commute22.3 minPutnam22.3 minOhio23.4 minUS 26.4 min
Population density71 / sq miPutnam71 / 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 Putnam County

Largest towns in Putnam County
TownZIP codesPopulation
Ottawa 1 4,441
Leipsic 1 2,033
Pandora 1 1,603
Columbus Grove 1 1,532
Kalida 1 1,526
Continental 1 1,368
Glandorf 1 1,162
Ottoville 1 845
Fort Jennings 1 482
Dupont 1 287
Miller City 1 186
Vaughnsville 1 160
Cloverdale 1 108
Belmore 1 81

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 Putnam County.

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

Every ZIP code in Putnam County, with figures

ZIP codes in Putnam County
ZIP City Type Population Median income Median home
45815 Belmore , OH Standard 81 $60,000 —
45827 Cloverdale , OH Standard 2,186 $85,400 $203,300
45830 Columbus Grove , OH Standard 5,199 $80,897 $169,900
45831 Continental , OH Standard 3,233 $71,473 $168,000
45837 Dupont , OH No street area — — —
45844 Fort Jennings , OH Standard 3,059 $88,792 $231,300
45848 Glandorf , OH Standard 76 $77,813 $243,300
45853 Kalida , OH Standard 1,526 $87,500 $196,100
45856 Leipsic , OH Standard 5,042 $86,494 $165,100
45864 Miller City , OH Standard 225 $81,875 $162,500
45875 Ottawa , OH Standard 11,547 $93,144 $229,800
45876 Ottoville , OH Standard 829 $71,125 $249,100
45877 Pandora , OH Standard 2,562 $68,665 $179,200
45893 Vaughnsville , OH Standard 160 — $102,800

Cite this page

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

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