ZIP Codes of Trigg County, KY

Population & People
Population & People
Total Population
14,794
Household Income
Household Income
Median Income
$71,451
Housing
Housing
Total Housing Units
7,775
Business & Economy
Business & Economy
Total Businesses
235
Employment
Employment
Employment Rate
49.42%
Education
Education
Bachelor's Degree+
21.71%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 2 ZIPs in this county.
Data Last Updated: June 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:2:12:22 PM
Population:14,794 [See All]
FIPS:21221
CBSA:Clarksville, TN-KY
Land Area:451 sq mi
Water Area:19 sq mi
Coordinates:36.9188, -87.7873
Quick Link:
https://www.zip-codes.com/county/ky-trigg.asp
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Kentucky's #72 most populous county
14,794 residents across 2 ZIPs — #72 of 120 Kentucky counties.

Standout ZIPs in this County


Most Populous
Cadiz · 13,475 people
91.1% of county total
Highest Income
Cerulean · $83,098 median
1.2× county average
Largest Land Area
Cadiz · 389.8 sq mi
Spans the most ground
Fastest Growth
Cadiz · 2.9% (10-yr)
13,098 → 13,475 residents
Most Educated
Cadiz · 22.4% bachelor's+
2,149 of 9,602 adults 25+

Things worth knowing about Trigg County


14,794 residents live across 2 ZIPs covering 451 sq mi, served by 2 distinct USPS-recognized cities.

Population moved from 14,466 to 14,794 from 2014 to 2024 — a +2.3% change. 1 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 42215 (Cerulean, $83,098 median) and poorest ZIP 42211 (Cadiz, $59,804) are 20.4 miles apart — a 1.4× income gap across local geography.

Median home values vary 1.0× across this county — from $201,300 in 42215 (Cerulean) to $210,000 in 42211 (Cadiz).

Density varies across the county — from 22 people/sq mi in 42215 (Cerulean) to 35 in 42211 (Cadiz).

Educational attainment ranges from 15.0% bachelor's+ in 42215 (Cerulean) to 22.4% in 42211 (Cadiz) — the breadth of educational profiles across the area.

Within Kentucky, this is the #72 most populous of 120 counties and ranks #22 for median household income .

Weighted by population, the typical household earns about $61,881 across the county — reflecting what a typical resident sees, not a simple ZIP average.

21.7% of adults age 25+ hold a bachelor's degree or higher (2,293 of 10,562 reporting).

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

Stories about Trigg 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.

Cadiz

All ZIP Codes in Trigg County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
42211CadizStandard13,475$59,804389.82.9%
42215CeruleanStandard1,319$83,09861.0-3.6%

Adjacent & Nearby Counties