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County ZIP codes · Arkansas · FIPS 05071

Johnson County, AR ZIP Codes

Johnson County, Arkansas has 12 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 8 of the residential ones lie mainly in Johnson County and 4 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $42,416 in 72830 (Clarksville) to $61,158 in 72847 (London) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Johnson County?

72752 · Pettigrew: –72821 · Altus: $37k72830 · Clarksville: $42k72832 · Coal Hill: $27k72839 · Hagarville: $49k72840 · Hartman: $50k72845 · Knoxville: $64k72846 · Lamar: $61k72847 · London: $61k72852 · Oark: $48k72854 · Ozone: –72949 · Ozark: $57k729497283072839727527285472852728467284072847728217284572752 · Pettigrew: –72821 · Altus: $37k72830 · Clarksville: $42k72832 · Coal Hill: $27k72839 · Hagarville: $49k72840 · Hartman: $50k72845 · Knoxville: $64k72846 · Lamar: $61k72847 · London: $61k72852 · Oark: $48k72854 · Ozone: –72949 · Ozark: $57k729497283072839727527285472852728467284072847728217284572752 · Pettigrew: –72821 · Altus: $37k72830 · Clarksville: $42k72832 · Coal Hill: $27k72839 · Hagarville: $49k72840 · Hartman: $50k72845 · Knoxville: $64k72846 · Lamar: $61k72847 · London: $61k72852 · Oark: $48k72854 · Ozone: –72949 · Ozark: $57k729497283072839727527285472852728467284072847
The residential ZIP codes of Johnson County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

They carry 12 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 12 residential ZIP codes in Johnson County

8 ZIP codes lie mainly in Johnson County; 4 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Johnson County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
72830 Clarksville 15,757 113 $42k $155k 100%
72846 Lamar 3,853 39 $61k $152k 86%
72840 Hartman 2,448 52 $50k $93k 100%
72845 Knoxville 1,063 96 $64k $119k 100%
72854 Ozone 791 6 – $100k 64%
72832 Coal Hill 649 190 $27k $87k 100%
72839 Hagarville 328 2 $49k $63k 88%
72852 Oark 189 2 $48k $110k 84%

Partly in Johnson County

Residential ZIP codes mainly in another county that reach at least 1% into Johnson County, by their share here
In this county
72821 Altus 1,972 62 $37k $100k 35%
72847 London 3,040 78 $61k $161k 30%
72752 Pettigrew 409 3 – $122k 20%
72949 Ozark 9,477 30 $57k $133k 10%

Download the 12 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

8 ZIP codes of Johnson County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Johnson County and in the neighboring counties
ZIPIn JohnsonElsewhere
7294910%Franklin County 88%; Logan County 2%
7284686%Pope County 14%
7284730%Pope County 70%
7282135%Franklin County 65%
7285464%Newton County 36%
7275220%Madison County 49%; Newton County 31%
7283988%Pope County 11%; Newton County 1%
7285284%Newton County 16%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Johnson County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Johnson County's ZIP codes use 3 prefixes: 727, 728 and 729.

Three-digit prefixes of Johnson County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Johnson County's
PrefixSectional centerHereAll codes
727 Nw Arkansas, AR (SCF 727) 1 52
728 Little Rock, AR (SCF 720) 10 38
729 Nw Arkansas, AR (SCF 727) 1 43

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.