Marshall County, Kentucky ZIP codes
4 ZIP codes are in Marshall County, plus 4 that cross in from neighboring counties.
- ZIP codes
- 4
- Population in these ZIPs
- 31,470
- Avg. median income
- $66,500population-weighted
- Cities & towns
- 4
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ZIP codes in Marshall County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 42025 | Benton | 19,941 | $70,067 | $206,000 |
| 42029 | Calvert City | 5,552 | $64,083 | $181,000 |
| 42044 | Gilbertsville | 3,894 | $57,333 | $240,800 |
| 42048 | Hardin | 2,083 | $55,714 | $148,700 |
ZIP codes partly in Marshall County
These ZIP codes are mostly in a neighboring county but cover part of Marshall County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 42036 | Dexter | Calloway County | 1,194 | $97,904 | $161,200 |
| 42054 | Kirksey | Calloway County | 837 | $58,911 | $217,500 |
| 42066 | Mayfield | Graves County | 23,917 | $48,664 | $168,300 |
| 42082 | Symsonia | Graves County | 1,803 | $67,000 | $187,500 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Marshall County
Nearby counties
Frequently asked questions
How many ZIP codes are in Marshall County, Kentucky?
4 ZIP codes are mainly in Marshall County, and 4 more ZIP codes from neighboring areas reach partly into it.
What cities are in Marshall County?
ZIP codes in Marshall County use the city names Benton, Calvert City, Gilbertsville and Hardin.