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County ZIP codes · Illinois · FIPS 17025

Clay County, IL ZIP Codes

Clay County, Illinois has 13 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 7 of the residential ones lie mainly in Clay County and 6 mainly in a neighboring county; 11 cross the county line. Median household income ranges from $53,685 in 62839 (Flora) to $86,950 in 62443 (Mason) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Clay County?

62424 · Dieterich: $85k62426 · Edgewood: $52k62434 · Ingraham: –62443 · Mason: $87k62448 · Newton: $74k62824 · Clay City: $62k62838 · Farina: $83k62839 · Flora: $54k62854 · Kinmundy: $64k62858 · Louisville: $66k62868 · Noble: $62k62879 · Sailor Springs: $27k62899 · Xenia: $56k62448628386285862868628246285462424624436289962839624266243462424 · Dieterich: $85k62426 · Edgewood: $52k62434 · Ingraham: –62443 · Mason: $87k62448 · Newton: $74k62824 · Clay City: $62k62838 · Farina: $83k62839 · Flora: $54k62854 · Kinmundy: $64k62858 · Louisville: $66k62868 · Noble: $62k62879 · Sailor Springs: $27k62899 · Xenia: $56k62448628386285862868628246285462424624436289962839624266243462424 · Dieterich: $85k62426 · Edgewood: $52k62434 · Ingraham: –62443 · Mason: $87k62448 · Newton: $74k62824 · Clay City: $62k62838 · Farina: $83k62839 · Flora: $54k62854 · Kinmundy: $64k62858 · Louisville: $66k62868 · Noble: $62k62879 · Sailor Springs: $27k62899 · Xenia: $56k62448628386285862868628546242462443628996283962434
The residential ZIP codes of Clay 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?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $61,645 and $82,976.

They carry 13 postal town names.

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

All 13 residential ZIP codes in Clay County

7 ZIP codes lie mainly in Clay County; 6 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Clay County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
62839 Flora 6,183 87 $54k $84k 100%
62858 Louisville 3,554 23 $66k $151k 99%
62899 Xenia 2,022 19 $56k $148k 59%
62824 Clay City 1,485 15 $62k $102k 85%
62426 Edgewood 778 19 $52k $96k 56%
62434 Ingraham 191 7 – $193k 61%
62879 Sailor Springs 28 226 $27k $23k 100%

Partly in Clay County

Residential ZIP codes mainly in another county that reach at least 1% into Clay County, by their share here
In this county
62838 Farina 1,341 14 $83k $133k 29%
62868 Noble 1,463 14 $62k $116k 17%
62443 Mason 1,609 21 $87k $172k 11%
62424 Dieterich 2,500 29 $85k $226k 1%
62448 Newton 5,356 26 $74k $127k 1%
62854 Kinmundy 1,827 20 $64k $102k 1%

Download the 13 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?

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

Share of each ZIP code's land in Clay County and in the neighboring counties
ZIPIn ClayElsewhere
624481%Jasper County 97%; Richland County 2%
6285899%Effingham County 1%
624241%Effingham County 91%; Jasper County 8%
6289959%Wayne County 41%
628541%Marion County 98%
6244311%Effingham County 89%
6282485%Wayne County 15%
6286817%Richland County 67%; Wayne County 16%
6283829%Fayette County 61%; Marion County 8%; Effingham County 1%
6242656%Effingham County 32%; Fayette County 12%
6243461%Jasper County 39%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Clay County's ZIP codes use 2 prefixes: 624 and 628.

Three-digit prefixes of Clay 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 Clay County's
PrefixSectional centerHereAll codes
624 Champaign, IL (SCF 618) 5 61
628 St Louis, MO (SCF 630) 8 90

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