PR · 2026 Census Gazetteer

Puerto Rico counties by area

Official, comparable measurements for 78 counties and county equivalents.

Source fields preservedGEOID · ALAND · AWATER

County equivalents78

Combined land3,424.2 mi²

Combined water1,900.7 mi²

Largest by landArecibo Municipio

Understanding Puerto Rico’s county areas

The land-area range runs from Cataño Municipio at 4.8 mi² to Arecibo Municipio at 126 mi². The largest has 26.1 times the land area of the smallest and accounts for 3.7% of the combined county land in Puerto Rico.

The median county-equivalent land area is 42 mi², below the national median of 604.5 mi². The median describes the middle of the county size distribution; it does not describe how people or development are distributed. A state with a few very large counties can have a much smaller median than its largest entry suggests.

Where water changes the picture

Vieques Municipio has the most assigned water area, at 213.2 mi². Culebra Municipio has the highest water share, with water making up 93.1% of its total area. Water area and water percentage answer different questions: the first measures an amount, while the second measures the mix of land and water.

Across all 78 entries, water accounts for 35.7% of the combined total area. This is calculated from the summed land and water measurements, rather than averaging county percentages, which would give each small and large county equal weight.

Compare the largest and smallest county equivalents in Puerto Rico to see land, water, and total area on the same scale.

These calculations use the 2026 Census county records listed below. County-equivalent boundaries vary between states; area alone does not measure population, density, or usable land. See coverage and calculation rules.

Complete area table

Sorted from largest to smallest land area.

#	County / equivalent	Land	Water	Water share
1	Arecibo MunicipioGEOID 72013	126 mi²	45.2 mi²	26.4%
2	Ponce MunicipioGEOID 72113	114.9 mi²	78.7 mi²	40.6%
3	Utuado MunicipioGEOID 72141	113.6 mi²	1.5 mi²	1.3%
4	Coamo MunicipioGEOID 72043	78 mi²	0 mi²	0%
5	Mayagüez MunicipioGEOID 72097	77.6 mi²	196.5 mi²	71.7%
6	San Sebastián MunicipioGEOID 72131	70.5 mi²	0.8 mi²	1.2%
7	Cabo Rojo MunicipioGEOID 72023	70.4 mi²	107 mi²	60.3%
8	Salinas MunicipioGEOID 72123	69.4 mi²	44.7 mi²	39.2%
9	Yauco MunicipioGEOID 72153	67.8 mi²	0.6 mi²	0.9%
10	Adjuntas MunicipioGEOID 72001	66.6 mi²	0.4 mi²	0.6%
11	Ciales MunicipioGEOID 72039	66.6 mi²	0.2 mi²	0.3%
12	Guayama MunicipioGEOID 72057	65 mi²	41.8 mi²	39.1%
13	Orocovis MunicipioGEOID 72107	63.6 mi²	0.2 mi²	0.2%
14	Lares MunicipioGEOID 72081	61.4 mi²	0.2 mi²	0.3%
15	Río Grande MunicipioGEOID 72119	60.6 mi²	28.9 mi²	32.3%
16	Juana Díaz MunicipioGEOID 72075	60.4 mi²	46.8 mi²	43.7%
17	Lajas MunicipioGEOID 72079	60 mi²	41.2 mi²	40.7%
18	Caguas MunicipioGEOID 72025	58.6 mi²	0.5 mi²	0.8%
19	Isabela MunicipioGEOID 72071	55.3 mi²	36.5 mi²	39.8%
20	Yabucoa MunicipioGEOID 72151	55.2 mi²	28 mi²	33.7%
21	San Germán MunicipioGEOID 72125	54.4 mi²	0 mi²	0%
22	San Lorenzo MunicipioGEOID 72129	53.1 mi²	0.1 mi²	0.2%
23	Cayey MunicipioGEOID 72035	51.9 mi²	0 mi²	0.1%
24	Naguabo MunicipioGEOID 72103	51.7 mi²	20.6 mi²	28.5%
25	Vieques MunicipioGEOID 72147	50.8 mi²	213.2 mi²	80.8%
26	Moca MunicipioGEOID 72099	50.4 mi²	0 mi²	0%
27	San Juan MunicipioGEOID 72127	47.9 mi²	29.1 mi²	37.8%
28	Patillas MunicipioGEOID 72109	46.6 mi²	28.6 mi²	38%
29	Camuy MunicipioGEOID 72027	46.4 mi²	15.6 mi²	25.1%
30	Las Marías MunicipioGEOID 72083	46.4 mi²	0.1 mi²	0.2%
31	Vega Baja MunicipioGEOID 72145	45.9 mi²	22.3 mi²	32.8%
32	Carolina MunicipioGEOID 72031	45.4 mi²	14.9 mi²	24.8%
33	Manatí MunicipioGEOID 72091	44.7 mi²	25.8 mi²	36.6%
34	Humacao MunicipioGEOID 72069	44.7 mi²	26.7 mi²	37.4%
35	Peñuelas MunicipioGEOID 72111	44.7 mi²	23.2 mi²	34.2%
36	Jayuya MunicipioGEOID 72073	44.5 mi²	0 mi²	0%
37	Bayamón MunicipioGEOID 72021	44.4 mi²	0.1 mi²	0.3%
38	Corozal MunicipioGEOID 72047	42.5 mi²	0 mi²	0%
39	Guayanilla MunicipioGEOID 72059	42.2 mi²	22 mi²	34.2%
40	Hatillo MunicipioGEOID 72065	41.7 mi²	17 mi²	28.9%
41	Añasco MunicipioGEOID 72011	39.3 mi²	5.6 mi²	12.5%
42	Morovis MunicipioGEOID 72101	38.9 mi²	0.1 mi²	0.1%
43	Guánica MunicipioGEOID 72055	37.1 mi²	42.4 mi²	53.3%
44	Maricao MunicipioGEOID 72093	36.6 mi²	0 mi²	0%
45	Aguadilla MunicipioGEOID 72005	36.5 mi²	39 mi²	51.6%
46	Sabana Grande MunicipioGEOID 72121	36.3 mi²	0 mi²	0%
47	Cidra MunicipioGEOID 72041	36 mi²	0.5 mi²	1.2%
48	Villalba MunicipioGEOID 72149	35.6 mi²	1.4 mi²	3.8%
49	Barranquitas MunicipioGEOID 72019	34.2 mi²	0 mi²	0%
50	Santa Isabel MunicipioGEOID 72133	34.1 mi²	42.9 mi²	55.7%
51	Las Piedras MunicipioGEOID 72085	33.9 mi²	0 mi²	0%
52	Canóvanas MunicipioGEOID 72029	32.9 mi²	0.1 mi²	0.4%
53	Aibonito MunicipioGEOID 72009	31.3 mi²	0 mi²	0.1%
54	Aguada MunicipioGEOID 72003	30.8 mi²	14.7 mi²	32.2%
55	Aguas Buenas MunicipioGEOID 72007	30.1 mi²	0 mi²	0%
56	Fajardo MunicipioGEOID 72053	29.9 mi²	75.4 mi²	71.6%
57	Ceiba MunicipioGEOID 72037	29 mi²	129.8 mi²	81.7%
58	Comerío MunicipioGEOID 72045	28.4 mi²	0.1 mi²	0.5%
59	Gurabo MunicipioGEOID 72063	27.9 mi²	0.4 mi²	1.5%
60	Vega Alta MunicipioGEOID 72143	27.7 mi²	9.8 mi²	26.1%
61	Guaynabo MunicipioGEOID 72061	27.6 mi²	0.2 mi²	0.7%
62	Naranjito MunicipioGEOID 72105	27.4 mi²	0.3 mi²	1.1%
63	Toa Alta MunicipioGEOID 72135	27 mi²	0.6 mi²	2.1%
64	Juncos MunicipioGEOID 72077	26.5 mi²	0.1 mi²	0.5%
65	Luquillo MunicipioGEOID 72089	25.8 mi²	20.7 mi²	44.5%
66	Toa Baja MunicipioGEOID 72137	23.3 mi²	18.5 mi²	44.3%
67	Dorado MunicipioGEOID 72051	23.1 mi²	30.6 mi²	57%
68	Quebradillas MunicipioGEOID 72115	22.7 mi²	11.7 mi²	34%
69	Maunabo MunicipioGEOID 72095	21.2 mi²	17.2 mi²	44.8%
70	Trujillo Alto MunicipioGEOID 72139	20.7 mi²	0.6 mi²	2.9%
71	Loíza MunicipioGEOID 72087	19.4 mi²	46.2 mi²	70.5%
72	Barceloneta MunicipioGEOID 72017	18.7 mi²	12.3 mi²	39.7%
73	Florida MunicipioGEOID 72054	15.2 mi²	0 mi²	0.1%
74	Arroyo MunicipioGEOID 72015	15 mi²	20.6 mi²	57.9%
75	Rincón MunicipioGEOID 72117	14.3 mi²	40.1 mi²	73.7%
76	Culebra MunicipioGEOID 72049	11.6 mi²	157.2 mi²	93.1%
77	Hormigueros MunicipioGEOID 72067	11.3 mi²	0 mi²	0%
78	Cataño MunicipioGEOID 72033	4.8 mi²	2.2 mi²	31%

How to read this table. Land and water areas are Census statistical measurements in square miles. Adding county rows can differ slightly from separately published state totals because of rounding and geographic treatment.