Johnson County, AR ZIP codes
There are 8 ZIP codes in Johnson County, AR, in 8 towns, from 72830 to 72854. The largest are 72830 (Clarksville), 72846 (Lamar) and 72840 (Hartman).
The county seat is Clarksville.
- ZIP codes
- 8
- Towns
- 8
- County seat
- Clarksville
- County FIPS
05071- State
- Arkansas
- Population
- 26,003
- Median household income
- $45,995
- Land area
- 661 sq mi
- Area code
- 479
Johnson County ZIP codes by town
- Clarksville (county seat)
- 72830
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 Johnson County ZIP codes
The ZIP codes of Johnson 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.
Johnson County in numbers
About 26,003 people live in Johnson County, in 10,316 households, the 24th most populous of Arkansas's 75 counties. The median household income is $45,995 a year, 24% below the Arkansas median of $60,773 (US: $80,734). The median owner-occupied home is valued at $135,300 (28% below the Arkansas median), and median gross rent is $728 a month. The median age is 39.1; 17.8% of adults 25 and over hold a bachelor's degree or higher (25.7% across Arkansas); the average commute takes 19 minutes.
| Population | 26,003 |
|---|---|
| Households | 10,316 |
| Median age | 39.1 |
| Median household income | $45,995 |
| Median home value | $135,300 |
| Median gross rent | $728 |
| Bachelor's degree or higher | 17.8% |
| Mean commute | 19.3 min |
| Population density | 39 / 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 Johnson County
| Town | ZIP codes | Population |
|---|---|---|
| Clarksville | 1 | 9,526 |
| Lamar | 1 | 1,783 |
| Coal Hill | 1 | 892 |
| Hartman | 1 | 678 |
| Knoxville | 1 | 663 |
| Ozone | 1 | 194 |
| Hagarville | 1 | 89 |
| Oark | 1 | 18 |
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 Johnson County.
Not sure you are in Johnson County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Johnson County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
72830 | Clarksville , AR | Standard | 15,757 | $42,416 | $155,000 |
72832 | Coal Hill , AR | Standard | 649 | $27,356 | $86,500 |
72839 | Hagarville , AR | Standard | 328 | $48,750 | $63,200 |
72840 | Hartman , AR | Standard | 2,448 | $49,750 | $93,200 |
72845 | Knoxville , AR | Standard | 1,063 | $63,462 | $118,500 |
72846 | Lamar , AR | Standard | 3,853 | $61,250 | $151,700 |
72852 | Oark , AR | Standard | 189 | $48,241 | $110,400 |
72854 | Ozone , AR | Standard | 791 | — | $99,700 |
Cite this page
zipcodes.pro. “Johnson County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ar/county/johnson
Underlying data is public domain or openly licensed — sources, vintages and licences.