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County ZIP codes · Kentucky · FIPS 21225

Union County, KY ZIP Codes

Union County, Kentucky has 6 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 5 residential and 1 for PO boxes or a single organization. 4 of the residential ones lie mainly in Union County and 1 mainly in a neighboring county; 5 cross the county line. Median household income ranges from $47,746 in 42461 (Uniontown) to $66,373 in 42462 (Waverly) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Union County?

42404 · Clay: $61k42437 · Morganfield: $65k42459 · Sturgis: $52k42461 · Uniontown: $48k42462 · Waverly: $66k424374245942404424624246142404 · Clay: $61k42437 · Morganfield: $65k42459 · Sturgis: $52k42461 · Uniontown: $48k42462 · Waverly: $66k424374245942404424624246142404 · Clay: $61k42437 · Morganfield: $65k42459 · Sturgis: $52k42461 · Uniontown: $48k42462 · Waverly: $66k4243742459424044246242461
The residential ZIP codes of Union 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 $51,563 and $65,256.

They carry 5 postal town names: Morganfield, Sturgis, Clay, Waverly, Uniontown.

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

All 5 residential ZIP codes in Union County

4 ZIP codes lie mainly in Union County; 1 more reaches into it from a neighboring county and follows the first table.

Residential ZIP codes mainly in Union County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
42437 Morganfield 7,064 42 $65k $110k 97%
42459 Sturgis 3,903 31 $52k $97k 82%
42462 Waverly 1,546 32 $66k $137k 68%
42461 Uniontown 1,285 41 $48k $104k 99%

Partly in Union County

Residential ZIP codes mainly in another county that reach at least 1% into Union County, by their share here
In this county
42404 Clay 2,109 24 $61k $115k 6%

Download the 6 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?

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

Share of each ZIP code's land in Union County and in the neighboring counties
ZIPIn UnionElsewhere
4243797%Webster County 3%
4245982%Crittenden County 18%
424046%Webster County 94%
4246268%Henderson County 32%
4246199%Henderson County 1%

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

PO Box and single-organization ZIP codes

ZIP codes in Union County without a residential area (GeoNames postal codes)
ZIPPostal name
42460Sullivan

Source: GeoNames postal codes (CC BY 4.0).

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Union County starts with 424.

Three-digit prefixes of Union 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 Union County's
PrefixSectional centerHereAll codes
424 Evansville, IN (SCF 476) 6 32

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