Administrative divisions of Ilocos Sur

The province of Ilocos Sur is politically subdivided into 32 municipalities and 2 component cities, all of which are organized into two legislative districts. There are a total of 768 barangays in the province.

•  †  Provincial capital and component city
•  ∗  Component city
•      Municipality

City or municipality		District	Population (2010)		Area		Density		Brgy.	Coordinates
					km2	sq mi	/km2	/sq mi
Alilem		2nd	1.0%	6,640	119.33	46.07	56	150	9
Banayoyo		2nd	1.2%	7,694	24.63	9.51	310	800	14
Bantay		1st	5.2%	34,323	76.60	29.58	450	1,200	34
Burgos		2nd	1.8%	11,679	44.38	17.14	260	670	26
Cabugao		1st	5.4%	35,706	95.56	36.90	370	960	33
Candon	∗	2nd	8.8%	57,884	103.28	39.88	560	1,500	42
Caoayan		1st	2.8%	18,551	17.42	6.73	1,100	2,800	17
Cervantes		2nd	2.5%	16,573	234.70	90.62	71	180	13
Galimuyod		2nd	1.5%	10,011	34.40	13.28	290	750	24
Gregorio del Pilar (Concepcion)		2nd	0.6%	4,219	41.66	16.09	100	260	7
Lidlidda		2nd	0.7%	4,398	33.84	13.07	130	340	11
Magsingal		1st	4.3%	28,302	84.98	32.81	330	850	30
Nagbukel		2nd	0.7%	4,938	43.12	16.65	110	280	12
Narvacan		2nd	6.5%	42,803	122.21	47.19	350	910	34
Quirino (Angkaki)		2nd	1.3%	8,535	240.10	92.70	36	93	9
Salcedo (Baugen)		2nd	1.7%	10,935	103.44	39.94	110	280	21
San Emilio		2nd	1.1%	7,427	141.44	54.61	53	140	8
San Esteban		2nd	1.2%	8,072	19.62	7.58	410	1,100	10
San Ildefonso		1st	1.1%	7,075	11.35	4.38	620	1,600	15
San Juan (Lapog)		1st	3.8%	25,199	64.37	24.85	390	1,000	32
San Vicente		1st	1.8%	11,720	12.60	4.86	930	2,400	7
Santa		2nd	2.3%	15,106	109.10	42.12	140	360	26
Santa Catalina		1st	2.1%	13,597	9.68	3.74	1,400	3,600	9
Santa Cruz		2nd	5.8%	37,911	88.78	34.28	430	1,100	49
Santa Lucia		2nd	3.8%	24,981	49.72	19.20	500	1,300	36
Santa Maria		2nd	4.3%	28,597	63.31	24.44	450	1,200	33
Santiago		2nd	2.7%	17,958	46.36	17.90	390	1,000	24
Santo Domingo		1st	4.2%	27,596	55.49	21.42	500	1,300	36
Sigay		2nd	0.4%	2,419	81.55	31.49	30	78	7
Sinait		1st	3.9%	25,427	65.56	25.31	390	1,000	44
Sugpon		2nd	0.6%	3,820	57.11	22.05	67	170	6
Suyo		2nd	1.6%	10,622	124.00	47.88	86	220	8
Tagudin		2nd	5.8%	38,122	151.19	58.37	250	650	43
Vigan	†	1st	7.6%	49,747	25.12	9.70	2,000	5,200	39
Total				658,587	2,596.00	1,002.32	250	650	768	(see GeoGroup box)
^ Former names are italicized. ^ Coordinates mark the city/town center, and are sortable by latitude.

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See also

• Legislative districts of Ilocos Sur
• List of barangays in Ilocos Sur