Table 1.  The Most Populous Municipios and Places in 2010 in Puerto Rico:  2000 and 2010
(For information on confidentiality protection, nonsampling error, and definitions, see http://www.census.gov/prod/cen2010/pl94-171.pdf)
Population rank				Population		Change, 2000 to 2010
2010	2000		Geographic area	2000 1	2010	Number	Percent
			Puerto Rico………………………………………………………	3 808 610	3 725 789	- 82 821	-2.2
			MUNICIPIO 2
1	1		San Juan Municipio………………………………………….	434 374	395 326	- 39 048	-9.0
2	2		Bayamón Municipio…………………………………………	224 044	208 116	- 15 928	-7.1
3	4		Carolina Municipio…………………………………………..	186 076	176 762	- 9 314	-5.0
4	3		Ponce Municipio……………………………………………..	186 475	166 327	- 20 148	-10.8
5	5		Caguas Municipio……………………………………………………..	140 502	142 893	2 391	1.7
6	7		Guaynabo Municipio…………………………………………	100 053	97 924	- 2 129	-2.1
7	6		Arecibo Municipio…………………………………………….	100 131	96 440	- 3 691	-3.7
8	9		Toa Baja Municipio…………………………………………	94 085	89 609	- 4 476	-4.8
9	8		Mayagüez Municipio…………………………………………..	98 434	89 080	- 9 354	-9.5
10	10		Trujillo Alto Municipio…………………………………………	75 728	74 842	- 886	-1.2
11	12		Toa Alta Municipio…………………………………………….	63 929	74 066	10 137	15.9
12	11		Aguadilla Municipio…………………………………………	64 685	60 949	- 3 736	-5.8
13	13		Vega Baja Municipio………………………………………..	61 929	59 662	- 2 267	-3.7
14	14		Humacao Municipio………………………………………….	59 035	58 466	- 569	-1.0
15	15		Río Grande Municipio………………………………………	52 362	54 304	1 942	3.7
16	18		Cabo Rojo Municipio………………………………………..	46 911	50 917	4 006	8.5
17	16		Juana Díaz Municipio…………………………………….	50 531	50 747	216	0.4
18	17		Cayey Municipio…………………………………………..	47 370	48 119	749	1.6
19	24		Canóvanas Municipio……………………………………….	43 335	47 648	4 313	10.0
20	21		Isabela Municipio………………………………………….	44 444	45 631	1 187	2.7
			PLACE 3
1	1		San Juan zona urbana……………………………………..	421 958	381 931	- 40 027	-9.5
2	2		Bayamón zona urbana…………………………………….	203 499	185 996	- 17 503	-8.6
3	3		Carolina zona urbana……………………………………….	168 164	157 832	- 10 332	-6.1
4	4		Ponce zona urbana…………………………………………..	155 038	132 502	- 22 536	-14.5
5	5		Caguas zona urbana………………………………………..	88 680	82 243	- 6 437	-7.3
6	6		Guaynabo zona urbana…………………………………………..	78 806	75 443	- 3 363	-4.3
7	7		Mayagüez zona urbana………………………………………………..	78 647	70 463	- 8 184	-10.4
8	8		Trujillo Alto zona urbana……………………………………	50 841	48 437	- 2 404	-4.7
9	9		Arecibo zona urbana…………………………………………	49 318	44 191	- 5 127	-10.4
10	10		Fajardo zona urbana…………………………………………	33 286	28 930	- 4 356	-13.1
11	12		Cataño zona urbana………………………………………..	30 071	28 140	- 1 931	-6.4
12	11		Levittown comunidad………………………………………….	30 140	26 960	- 3 180	-10.6
13	13		Vega Baja zona urbana…………………………………………	28 811	25 905	- 2 906	-10.1
14	14		Guayama zona urbana………………………………………	21 624	22 691	1 067	4.9
15	15		Humacao zona urbana……………………………………….	20 682	18 629	- 2 053	-9.9
16	17		Yauco zona urbana……………………………………….	19 609	17 186	- 2 423	-12.4
17	18		Candelaria comunidad…………………………………………	17 300	16 760	- 540	-3.1
18	16		Cayey zona urbana………………………………………….	19 940	16 680	- 3 260	-16.3
19	20		Manatí zona urbana………………………………………….	16 173	14 011	- 2 162	-13.4
20	19		Aguadilla zona urbana…………………………………………….	16 776	13 310	- 3 466	-20.7
1 Census 2000 counts are as published in Census 2000 reports and thus do not include any changes published subsequently due to boundary changes or to the Count Question Resolution program.
2 In Puerto Rico, the primary divisions are municipios, which correspond to counties.
3 Data are shown for census designated places (CDPs) which are statistical areas defined for concentrations of population outside of incorporated places.  All places shown for Puerto Rico are CDPs identified as zonas urbanas or comunidades.  Puerto Rico has no incorporated places.
Source:  U.S. Census Bureau, Census 2000 Redistricting Data (Public Law 94-171) Summary File, Table PL1, and 2010 Census Redistricting Data (Public Law 94-171) Summary File, Table P1.