Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — STATE/OH/COUNTY/CLARK

Clark County, OH ZIP codes

There are 16 ZIP codes in Clark County, OH, in 11 towns, from 43010 to 45506. The largest are 45503 (Springfield), 45505 (Springfield) and 45502 (Springfield).

The county seat is Springfield.

ZIP codes
16
Towns
11
County seat
Springfield
County FIPS
39023
State
Ohio
Population
135,158
Median household income
$63,132
Land area
396 sq mi
Area codes
326, 937
Metro area
Springfield

Clark County ZIP codes by town

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 Clark County ZIP codes

43010453164531945323453414534445349453684536945372455014550245503455044550545506

The ZIP codes of Clark 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.

Clark County in numbers

About 135,158 people live in Clark County, in 55,975 households, the 21st most populous of Ohio's 88 counties. The median household income is $63,132 a year, 12% below the Ohio median of $71,389 (US: $80,734). The median owner-occupied home is valued at $169,900 (21% below the Ohio median), and median gross rent is $872 a month. The median age is 41.2; 20.2% of adults 25 and over hold a bachelor's degree or higher (31.5% across Ohio); the average commute takes 23 minutes.

Population135,158Clark135,158
Households55,975Clark55,975
Median age41.2Clark41.2Ohio39.7US 38.9
Median household income$63,132Clark$63,132Ohio$71,389US $80,734
Median home value$169,900Clark$169,900Ohio$214,800US $332,700
Median gross rent$872Clark$872Ohio$1,034US $1,413
Bachelor's degree or higher20.2%Clark20.2%Ohio31.5%US 35.7%
Mean commute23.1 minClark23.1 minOhio23.4 minUS 26.4 min
Population density341 / sq miClark341 / 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 Clark County

Largest towns in Clark County
TownZIP codesPopulation
Springfield 6 58,190
New Carlisle 1 5,544
Enon 1 2,587
South Charleston 1 1,727
Medway 1 580
South Vienna 1 541
North Hampton 1 329
Donnelsville 1 308
Catawba 1 305
Tremont City 1 265
Clifton 1 143

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 Clark County.

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

Every ZIP code in Clark County, with figures

ZIP codes in Clark County
ZIP City Type Population Median income Median home
43010 Catawba , OH Standard 305 $68,500 $136,900
45316 Clifton , OH Standard 141 $83,125 $200,000
45319 Donnelsville , OH Standard 308 $67,708 $142,200
45323 Enon , OH Standard 4,961 $80,781 $187,900
45341 Medway , OH Standard 3,639 $56,470 $140,200
45344 New Carlisle , OH Standard 16,979 $78,471 $174,600
45349 North Hampton , OH Standard 234 $76,750 $173,600
45368 South Charleston , OH Standard 3,889 $60,850 $168,600
45369 South Vienna , OH Standard 4,120 $88,578 $221,100
45372 Tremont City , OH Standard 265 $70,500 $158,300
45501 Springfield , OH Standard 0 — —
45502 Springfield , OH Standard 17,692 $88,988 $243,600
45503 Springfield , OH Standard 32,638 $59,595 $168,200
45504 Springfield , OH Standard 16,363 $69,960 $180,600
45505 Springfield , OH Standard 19,826 $43,819 $95,500
45506 Springfield , OH Standard 13,435 $42,104 $107,300

Cite this page

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

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