Trigg County area

Population and density of Trigg County

The Census Bureau estimates that 14,512 people lived in Trigg County on July 1, 2025. That ranks #2,188 of 3,222 county equivalents nationally and #76 of 120 in Kentucky. Since the April 1, 2020 estimates base of 14,053, the population has grown by 459 (+3.3%), compared with +2.2% for Kentucky as a whole.

With 441.4 square miles of land, that is 33 people per square mile (13 per km²), placing Trigg County #1,921 nationally for density and #104 in Kentucky. The median county equivalent has 47 people per square mile; the Kentucky median is 59. Put another way, there are about 19 acres of land per resident.

U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.

Cities and towns in Trigg County

1 incorporated place lies at least partly in Trigg County. Together they are home to 2,771 people (19.1%); the other 11,741 (80.9%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Cadiz city, with 2,771 residents in the county.

Metropolitan area

Trigg County is an outlying county of the Clarksville, TN-KY Metropolitan Statistical Area. Its 4 county equivalents have 349,001 residents on 2,158.2 square miles of land; Trigg County accounts for 20.5% of the land and 4.2% of the residents. By combined land it ranks #146 of 393 metropolitan areas, and #160 by population.

ZIP codes

5 ZIP Code Tabulation Areas have land in Trigg County; 1 of them have most of their land inside the county, and the others mainly cover neighboring areas.

4221142215422324223642445

ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.

Counties bordering Trigg County

Trigg County shares a land border with 6 county equivalents, including 1 in Tennessee. It has more land than 4 of them. The largest neighbor is Christian County (717.8 mi²) and the smallest is Lyon County (213.8 mi²). Together with its neighbors, Trigg County forms a block of 2,864.6 mi² of land, of which it holds 15.4%.

How big is Trigg County compared with U.S. states?

Trigg County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 2.3 times as much. Kentucky’s county land could hold about 89 areas the size of Trigg County.

Another way to picture it: the same land area would fill a square about 21 miles (33.8 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.

State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.

What stands out about Trigg County?

Trigg County has more land than 921 of the other 3,221 county equivalents in the dataset.

A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.

Does including water change its rank?

Using land plus water places Trigg County at #2,241 nationally by total area, 60 places closer to the top than its land rank. The water assigned to this geography moves it ahead of some county equivalents with more land.

Its water share is 8.3%, compared with a national county-equivalent median of 1.2% — 7.1 percentage points higher. This describes the statistical geography’s land/water mix, not flood exposure or developable land.

Closest positions in the national land ranking

These entries sit immediately beside Trigg County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.