Guayanilla Municipio area

Population and density of Guayanilla Municipio

The Census Bureau estimates that 16,489 people lived in Guayanilla Municipio on July 1, 2025. That ranks #2,072 of 3,222 county equivalents nationally and #65 of 78 in Puerto Rico. Since the April 1, 2020 estimates base of 17,779, the population has declined by 1,290 (−7.3%), compared with −3.1% for Puerto Rico as a whole.

With 42.2 square miles of land, that is 390 people per square mile (151 per km²), placing Guayanilla Municipio #415 nationally for density and #64 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 1.6 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 Guayanilla Municipio

Puerto Rico has no incorporated places below the municipio: Guayanilla 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

Guayanilla Municipio is an outlying county of the Ponce, PR Metropolitan Statistical Area. Its 6 county equivalents have 262,792 residents on 365.6 square miles of land; Guayanilla Municipio accounts for 11.6% of the land and 6.3% of the residents. By combined land it ranks #383 of 393 metropolitan areas, and #194 by population. It belongs to the Ponce-Coamo, PR Combined Statistical Area.

ZIP codes

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

0065600698

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 Guayanilla Municipio

Guayanilla Municipio shares a land border with 3 county equivalents. Each of them has more land than Guayanilla Municipio. The largest neighbor is Yauco Municipio (67.8 mi²) and the smallest is Peñuelas Municipio (44.7 mi²). Together with its neighbors, Guayanilla Municipio forms a block of 221.3 mi² of land, of which it holds 19.1%.

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

Guayanilla Municipio has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 24 times as much. Puerto Rico’s county land could hold about 81 areas the size of Guayanilla Municipio.

Another way to picture it: the same land area would fill a square about 6.50 miles (10.5 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 Guayanilla Municipio?

Guayanilla Municipio has more land than 73 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 Guayanilla Municipio at #3,139 nationally by total area, 10 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 34.2%, compared with a national county-equivalent median of 1.2% — 33 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 Guayanilla 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.