ZIP Codes of Hickman County, KY

Population & People
Population & People
Total Population
3,634
Household Income
Household Income
Median Income
$45,902
Housing
Housing
Total Housing Units
1,897
Business & Economy
Business & Economy
Total Businesses
57
Employment
Employment
Employment Rate
52.28%
Education
Education
Bachelor's Degree+
16.78%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 2 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:2 ZIP Codes (2 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:270 / 364
Timezone:Central (GMT -06:00)
Local Time:11:53:37 PM
Population:3,634 [See All]
FIPS:21105
Land Area:179 sq mi
Water Area:2 sq mi
Coordinates:36.7010, -89.0740
Quick Link:
https://www.zip-codes.com/county/ky-hickman.asp
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Kentucky's oldest county
Median age 50.2.

Standout ZIPs in this County


Most Populous
Clinton · 3,411 people
93.9% of county total
Highest Income
Clinton · $57,097 median
1.2× county average
Largest Land Area
Clinton · 154.0 sq mi
Spans the most ground
Fastest Growth
Clinton · 0.7% (10-yr)
3,387 → 3,411 residents
Most Educated
Clinton · 17.6% bachelor's+
450 of 2,551 adults 25+

Things worth knowing about Hickman County


3,634 residents live across 2 ZIPs covering 179 sq mi, served by 2 distinct USPS-recognized cities.

Population moved from 3,586 to 3,634 from 2014 to 2024 — a +1.3% change. 2 ZIPs gained residents, 0 lost.

The county's wealthiest ZIP 42031 (Clinton, $57,097 median) and poorest ZIP 42032 (Columbus, $34,706) are 10.2 miles apart — a 1.6× income gap across local geography.

Median home values vary 2.0× across this county — from $58,500 in 42032 (Columbus) to $118,700 in 42031 (Clinton).

Density varies across the county — from 9 people/sq mi in 42032 (Columbus) to 22 in 42031 (Clinton).

Educational attainment ranges from 3.6% bachelor's+ in 42032 (Columbus) to 17.6% in 42031 (Clinton) — the breadth of educational profiles across the area.

Within Kentucky, this is the #119 most populous of 120 counties and ranks #94 for median household income .

Weighted by population, the typical household earns about $55,723 across the county — reflecting what a typical resident sees, not a simple ZIP average.

16.8% of adults age 25+ hold a bachelor's degree or higher (456 of 2,718 reporting).

2 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Hickman County


Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Clinton

All ZIP Codes in Hickman County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
42031ClintonStandard3,411$57,097154.00.7%
42032ColumbusStandard223$34,70624.812.1%

Adjacent & Nearby Counties