County outline
Where Aibonito Municipio is located
Area breakdown
Land accounts for 99.9% of Aibonito Municipio’s measured area and water for 0.1%. Its combined area converts to 81.1 square kilometers or approximately 20,047 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 31.297 | 81.059 | 20,030.1 |
| Water | 0.026 | 0.067 | 16.6 |
| Total | 31.323 | 81.126 | 20,046.7 |
How Aibonito Municipio compares
By original Census land area, Aibonito Municipio ranks #53 of 78 in Puerto Rico and #3166 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.745 times the Puerto Rico county-equivalent median of 42 square miles. It accounts for 0.9% of the combined county land area in the state.
See the complete Puerto Rico ranking · What counts as a county equivalent?
Population and density of Aibonito Municipio
The Census Bureau estimates that 24,746 people lived in Aibonito Municipio on July 1, 2025. That ranks #1,675 of 3,222 county equivalents nationally and #46 of 78 in Puerto Rico. Since the April 1, 2020 estimates base of 24,637, the population has grown by 109 (+0.4%), compared with −3.1% for Puerto Rico as a whole.
With 31.3 square miles of land, that is 791 people per square mile (305 per km²), placing Aibonito Municipio #231 nationally for density and #35 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 0.809 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 24,628 | 24,665 | 24,521 | 24,573 | 24,723 | 24,746 |
| Change | — | +37 | −144 | +52 | +150 | +23 |
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 Aibonito Municipio
Puerto Rico has no incorporated places below the municipio: Aibonito 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
Aibonito Municipio is an outlying county of the San Juan-Bayamón-Caguas, PR Metropolitan Statistical Area. Its 40 county equivalents have 2,024,195 residents on 1,437.8 square miles of land; Aibonito Municipio accounts for 2.2% of the land and 1.2% of the residents. By combined land it ranks #229 of 393 metropolitan areas, and #36 by population. It belongs to the San Juan-Bayamón, PR Combined Statistical Area.
ZIP codes
2 ZIP Code Tabulation Areas have land in Aibonito Municipio, and each lies mostly inside the county.
0070500786
ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Post-office-box and single-address ZIP Codes have no tabulation area.
Counties bordering Aibonito Municipio
Aibonito Municipio shares a land border with 5 county equivalents. Each of them has more land than Aibonito Municipio. The largest neighbor is Coamo Municipio (78 mi²) and the smallest is Barranquitas Municipio (34.2 mi²). Together with its neighbors, Aibonito Municipio forms a block of 300.9 mi² of land, of which it holds 10.4%.
| Bordering county equivalent | Land mi² | Size vs. Aibonito | Compare |
|---|---|---|---|
| Coamo Municipio | 78 | 2.5× larger | Compare |
| Salinas Municipio | 69.4 | 2.2× larger | Compare |
| Cayey Municipio | 51.9 | 1.7× larger | Compare |
| Cidra Municipio | 36 | 1.2× larger | Compare |
| Barranquitas Municipio | 34.2 | 1.1× larger | Compare |
How big is Aibonito Municipio compared with U.S. states?
Aibonito Municipio has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 33 times as much. Puerto Rico’s county land could hold about 109 areas the size of Aibonito Municipio.
Another way to picture it: the same land area would fill a square about 5.59 miles (9 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 Aibonito Municipio?
Aibonito Municipio has more land than 56 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 Aibonito Municipio at #3,183 nationally by total area, 17 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 0.1%, 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 Aibonito Municipio in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #3165 | Canóvanas Municipio, Puerto Rico | 32.9 | Compare |
| #3166 | Aibonito Municipio, Puerto Rico | 31.3 | This county |
| #3167 | Aguada Municipio, Puerto Rico | 30.8 | Compare |
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 18.130755, -66.264474. 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: 81,057,784 m²; AWATER: 66,447 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Aibonito Municipio?
Aibonito Municipio, Puerto Rico has 31.3 square miles (81.1 km²) of land and 0.026 square miles of water, for a total area of 31.3 square miles. It ranks #3166 of 3,222 U.S. county equivalents by land area.
Is Aibonito Municipio the largest county in Puerto Rico?
No. Aibonito Municipio ranks #53 of 78 in Puerto Rico by land area. The largest is Arecibo Municipio, with 126 square miles of land.
What counties border Aibonito Municipio?
Aibonito Municipio shares a land border with Coamo Municipio, Barranquitas Municipio, Cayey Municipio, Cidra Municipio, and Salinas Municipio.
What is the population of Aibonito Municipio?
The Census Bureau estimates Aibonito Municipio had 24,746 residents on July 1, 2025, ranking #1,675 of 3,222 county equivalents. That is 791 people per square mile of land.
What is the county seat of Aibonito Municipio?
The county seat of Aibonito Municipio is Aibonito.
Is Aibonito Municipio part of a metropolitan area?
Yes. It is an outlying county of the San Juan-Bayamón-Caguas, PR Metropolitan Statistical Area, which has 40 county equivalents and 2,024,195 residents.
How many ZIP codes are in Aibonito Municipio?
2 ZIP Code Tabulation Areas have land in Aibonito Municipio, and 2 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Aibonito Municipio compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 33 times as much land.
How many acres of land are in Aibonito Municipio?
The land measurement converts to approximately 20,030 acres. Including water, total area is approximately 20,047 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.