Monroe County area

Monroe County, Kentucky covers 332.1 square miles: 329.5 square miles of land and 2.582 square miles of water. Its county seat is Tompkinsville. An estimated 11,191 people lived there in 2025.

Official Census measurements · GEOID 211712026 Gazetteer · retrieved September 27, 2026
Land area329.5 mi²
Water area2.582 mi²
Population (2025)11,191
People per mi²34

County outline

Generalized outline of Monroe County, Kentucky
2025 Census cartographic boundary, fitted to this frame. County maps are not at a common scale. The 2026 area measurements below come from the separate Gazetteer release. Map source and limitations.

Where Monroe County is located

Monroe County highlighted on a map of all U.S. county equivalents. About the maps

Area breakdown

Land accounts for 99.2% of Monroe County’s measured area and water for 0.8%. Its combined area converts to 860 square kilometers or approximately 212,516 acres.

Green: land · blue: water

MeasurementSquare milesSquare kilometersAcres
Land329.475853.336210,864
Water2.5826.6871,652.5
Total332.057860.024212,516.5

How Monroe County compares

By original Census land area, Monroe County ranks #56 of 120 in Kentucky and #2738 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.

Its land area is 1.077 times the Kentucky county-equivalent median of 306 square miles. It accounts for 0.8% of the combined county land area in the state.

See the complete Kentucky ranking · What counts as a county equivalent?

Population and density of Monroe County

The Census Bureau estimates that 11,191 people lived in Monroe County on July 1, 2025. That ranks #2,406 of 3,222 county equivalents nationally and #94 of 120 in Kentucky. Since the April 1, 2020 estimates base of 11,335, the population has declined by 144 (−1.3%), compared with +2.2% for Kentucky as a whole.

With 329.5 square miles of land, that is 34 people per square mile (13 per km²), placing Monroe County #1,895 nationally for density and #102 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.

Estimated population, 2020–2025 · line scaled to this county’s own range
July 1202020212022202320242025
Estimate11,31511,25811,31511,24611,15611,191
Change—−57+57−69−90+35

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 Monroe County

3 incorporated places lie at least partly in Monroe County. Together they are home to 2,920 people (26.1%); the other 8,271 (73.9%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Tompkinsville city, with 2,235 residents in the county.

Incorporated placePopulation 2025Since 2020Land mi²
Tompkinsville cityCounty seat2,235−2.9%3.284
Gamaliel city468−2.3%0.79
Fountain Run city217−0.5%1.316

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Monroe County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Monroe County is not part of any metropolitan or micropolitan statistical area in the Office of Management and Budget’s July 2023 delineation; 1,306 other county equivalents are also outside one. These areas are built around an urban core of at least 10,000 people plus the counties tied to it by commuting, so counties outside them are generally rural.

ZIP codes

6 ZIP Code Tabulation Areas have land in Monroe County; 4 of them have most of their land inside the county, and the others mainly cover neighboring areas.

421334214042151421574216642167

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 Monroe County

Monroe County shares a land border with 6 county equivalents, including 2 in Tennessee. It has more land than 4 of them. The largest neighbor is Barren County (487.4 mi²) and the smallest is Clay County (236.5 mi²). Together with its neighbors, Monroe County forms a block of 2,299 mi² of land, of which it holds 14.3%.

Map of Monroe County and the 6 county equivalents that border it Clay County, Tennessee: 236.5 mi² landCumberland County, Kentucky: 305.1 mi² landBarren County, Kentucky: 487.4 mi² landMacon County, Tennessee: 307.1 mi² landMetcalfe County, Kentucky: 289.7 mi² landAllen County, Kentucky: 343.7 mi² land
Monroe County (dark) and its bordering county equivalents. Select a neighbor to open its profile. Drawn from the 2025 Census cartographic boundaries in an equal-area projection. How borders are determined.
Bordering county equivalentLand mi²Size vs. MonroeCompare
Barren County487.41.5× largerCompare
Allen County343.7about the sameCompare
Macon CountyTennessee307.11.1× smallerCompare
Cumberland County305.11.1× smallerCompare
Metcalfe County289.71.1× smallerCompare
Clay CountyTennessee236.51.4× smallerCompare

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

Monroe County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 3.1 times as much. Kentucky’s county land could hold about 120 areas the size of Monroe County.

Land area: Monroe County and the closest-sized states
Monroe County329.5 mi²
Rhode Island1,033.9 mi²

Another way to picture it: the same land area would fill a square about 18.2 miles (29.2 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 Monroe County?

Monroe County has more land than 484 of the other 3,221 county equivalents in the dataset.

Land area compared with the typical county equivalent
Monroe County329.5 mi²
Kentucky median306 mi²
National median604.5 mi²

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 Monroe County at #2,778 nationally by total area, 40 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.

Its water share is 0.8%, compared with a national county-equivalent median of 1.2% — 0.4 percentage points lower. 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 Monroe County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Land rankCounty equivalentLand mi²Comparison
#2737Dickenson County, Virginia330.4Compare
#2738Monroe County, Kentucky329.5This county
#2739Washington County, Rhode Island329.3Compare

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.

Representative coordinates

The Census internal point is 36.714077, -85.713508. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.

Source and precision

U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 853,335,721 m²; AWATER: 6,686,907 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.

Download the official county source ZIP ↗ · Methodology

Common questions

How big is Monroe County?

Monroe County, Kentucky has 329.5 square miles (853.3 km²) of land and 2.582 square miles of water, for a total area of 332.1 square miles. It ranks #2738 of 3,222 U.S. county equivalents by land area.

Is Monroe County the largest county in Kentucky?

No. Monroe County ranks #56 of 120 in Kentucky by land area. The largest is Pike County, with 786.2 square miles of land.

What counties border Monroe County?

Monroe County shares a land border with Clay County, Tennessee, Cumberland County, Barren County, Macon County, Tennessee, Metcalfe County, and Allen County.

What is the population of Monroe County?

The Census Bureau estimates Monroe County had 11,191 residents on July 1, 2025, ranking #2,406 of 3,222 county equivalents. That is 34 people per square mile of land.

What is the county seat of Monroe County?

The county seat of Monroe County is Tompkinsville.

What cities and towns are in Monroe County?

Monroe County has 3 incorporated places. The most populous are Tompkinsville city, Gamaliel city, and Fountain Run city; 8,271 residents live outside any incorporated place.

Is Monroe County part of a metropolitan area?

No. Monroe County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.

How many ZIP codes are in Monroe County?

6 ZIP Code Tabulation Areas have land in Monroe County, and 4 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.

How does Monroe County compare with U.S. states?

It has less land than every state. Rhode Island, the smallest, has 3.1 times as much land.

How many acres of land are in Monroe County?

The land measurement converts to approximately 210,864 acres. Including water, total area is approximately 212,516 acres. One square mile equals 640 acres.

Why might another source show a different area?

Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.

Can this establish a property boundary?

No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.

Cite this county

Download the complete CSV or JSON dataset