Montgomery County area

Population and density of Montgomery County

The Census Bureau estimates that 249,935 people lived in Montgomery County on July 1, 2025. That ranks #296 of 3,222 county equivalents nationally and #7 of 95 in Tennessee. Since the April 1, 2020 estimates base of 220,012, the population has grown by 29,923 (+13.6%), compared with +5.8% for Tennessee as a whole.

With 539.2 square miles of land, that is 464 people per square mile (179 per km²), placing Montgomery County #364 nationally for density and #7 in Tennessee. The median county equivalent has 47 people per square mile; the Tennessee median is 76. Put another way, there are about 1.4 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 Montgomery County

1 incorporated place lies at least partly in Montgomery County. Together they are home to 188,829 people (75.6%); the other 61,106 (24.4%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Clarksville city, with 188,829 residents in the county.

Metropolitan area

Montgomery County is a central 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; Montgomery County accounts for 25% of the land and 71.6% of the residents. By combined land it ranks #146 of 393 metropolitan areas, and #160 by population.

ZIP codes

15 ZIP Code Tabulation Areas have land in Montgomery County; 8 of them have most of their land inside the county, and the others mainly cover neighboring areas.

370103701537032370403704237043370503705137052370613707937142371713719142223

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 Montgomery County

Montgomery County shares a land border with 7 county equivalents, including 2 in Kentucky. It has more land than 6 of them. The largest neighbor is Christian County (717.8 mi²) and the smallest is Houston County (200.3 mi²). Together with its neighbors, Montgomery County forms a block of 3,560.3 mi² of land, of which it holds 15.1%.

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

Montgomery County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.9 times as much. Tennessee’s county land could hold about 76 areas the size of Montgomery County.

Another way to picture it: the same land area would fill a square about 23.2 miles (37.4 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 Montgomery County?

Montgomery County has more land than 1,281 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 Montgomery County at #2,025 nationally by total area, 84 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 0.9%, compared with a national county-equivalent median of 1.2% — 0.3 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 Montgomery 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.