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zipcodes.pro — STATE/IL/COUNTY/PUTNAM

Putnam County, IL ZIP codes

There are 7 ZIP codes in Putnam County, IL, in 7 towns, from 61326 to 61560. The largest are 61326 (Granville), 61327 (Hennepin) and 61560 (Putnam).

The county seat is Hennepin.

ZIP codes
7
Towns
7
County seat
Hennepin
County FIPS
17155
Population
5,601
Median household income
$75,590
Land area
160 sq mi
Metro area
Ottawa

Putnam County ZIP codes by town

Hennepin (county seat)
61327

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

61326613276133561336613406136361560

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 5,601 people live in Putnam County, in 2,465 households, the 94th most populous of Illinois's 102 counties. The median household income is $75,590 a year, 9% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $172,700 (34% below the Illinois median), and median gross rent is $851 a month. The median age is 47.4; 22.9% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 28 minutes.

Population5,601Putnam5,601
Households2,465Putnam2,465
Median age47.4Putnam47.4Illinois39.0US 38.9
Median household income$75,590Putnam$75,590Illinois$83,390US $80,734
Median home value$172,700Putnam$172,700Illinois$263,300US $332,700
Median gross rent$851Putnam$851Illinois$1,274US $1,413
Bachelor's degree or higher22.9%Putnam22.9%Illinois37.8%US 35.7%
Mean commute28.1 minPutnam28.1 minIllinois27.8 minUS 26.4 min
Population density35 / sq miPutnam35 / 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
Granville 1 1,472
Hennepin 1 929
Mark 1 574
Putnam 1 477
Mc Nabb 1 312
Standard 1 250
Magnolia 1 232

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
61326 Granville , IL Standard 1,953 $70,880 $148,100
61327 Hennepin , IL Standard 1,442 $89,306 $211,300
61335 Mc Nabb , IL Standard 312 $71,750 $169,600
61336 Magnolia , IL Standard 694 $92,298 $174,300
61340 Mark , IL Standard 545 $78,750 $160,100
61363 Standard , IL Standard 250 $60,000 $108,100
61560 Putnam , IL Standard 477 $73,333 $222,100

Cite this page

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

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