Coamo Municipio area

Population and density of Coamo Municipio

The Census Bureau estimates that 33,076 people lived in Coamo Municipio on July 1, 2025. That ranks #1,407 of 3,222 county equivalents nationally and #35 of 78 in Puerto Rico. Since the April 1, 2020 estimates base of 34,665, the population has declined by 1,589 (−4.6%), compared with −3.1% for Puerto Rico as a whole.

With 78 square miles of land, that is 424 people per square mile (164 per km²), placing Coamo Municipio #391 nationally for density and #63 in Puerto Rico. The median county equivalent has 47 people per square mile; the Puerto Rico median is 754. Put another way, there are about 1.5 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 Coamo Municipio

Puerto Rico has no incorporated places below the municipio: Coamo Municipio is itself the local government. The Census Bureau describes the settlements inside it, such as zonas urbanas and comunidades, as statistical places, and publishes no separate annual estimates for them.

Metropolitan area

Coamo Municipio is a central county of the Coamo, PR Micropolitan Statistical Area. Its 2 county equivalents have 52,623 residents on 112.1 square miles of land; Coamo Municipio accounts for 69.6% of the land and 62.9% of the residents. By combined land it ranks #537 of 542 micropolitan areas, and #208 by population. It belongs to the Ponce-Coamo, PR Combined Statistical Area.

ZIP codes

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

00705007200076900794

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 Coamo Municipio

Coamo Municipio shares a land border with 7 county equivalents. It has more land than every one of them. The largest neighbor is Salinas Municipio (69.4 mi²) and the smallest is Aibonito Municipio (31.3 mi²). Together with its neighbors, Coamo Municipio forms a block of 406.7 mi² of land, of which it holds 19.2%.

How big is Coamo Municipio compared with U.S. states?

Coamo Municipio has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 13 times as much. Puerto Rico’s county land could hold about 44 areas the size of Coamo Municipio.

Another way to picture it: the same land area would fill a square about 8.83 miles (14.2 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 Coamo Municipio?

Coamo Municipio has more land than 123 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 Coamo Municipio at #3,122 nationally by total area, 23 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%, compared with a national county-equivalent median of 1.2% — 1.1 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 Coamo Municipio 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.