Ilocos Sur

Summary data
Map of the Philippines highlighting Ilocos Sur
Island groupLuzon
RegionIlocos Region (Region I)
CapitalVigan
Total local government units
Cities2
Municipalities32
Barangays768
Coastal/Landlockedcoastal
Marine waterbodiesSouth China Sea
Area (2007)2,596.00 km2
(1,002.32 sq. mi)
Population (2015)689,668
Density (2015)266 per km2
(688 per sq. mi)
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Ilocos Sur is a province in the Philippines situated in the Ilocos Region occupying the northwestern section of Luzon. Its capital is the City of Vigan.

The province has a land area of 2,596.00 square kilometers or 1,002.32 square miles. The 2015 Census records its population as 689,668 representing 13.72% of the total population of the Ilocos Region, 1.20% of the overall population of the Luzon island group, or 0.68% of the entire population of the Philippines. Based on such figures, the population density is computed at 266 inhabitants per square kilometer or 688 inhabitants per square mile.

Map

Ilocos Sur is bordered, clockwise from the North, by Ilocos Norte, Abra, Mountain Province, Benguet, La Union, and the South China Sea.

Local government units

Ilocos Sur has 32 municipalities and 2 cities. The total number of barangays in the province is 768.

NameType
Population and
Population
percentage

(2015)
Population
(2010)
Annual
Population
Growth Rate
(2010-2015)
Area
(2007)
Density
(2015)
Brgy
count
Alilemmun6,695
(0.97%)
6,6400.16%119.33 km2
(46.07 sq mi)
56 per km2
(145 per sq mi)
9
Banayoyomun7,748
(1.12%)
7,6940.13%24.63 km2
(9.51 sq mi)
315 per km2
(815 per sq mi)
14
Bantaymun35,731
(5.18%)
34,3230.77%76.60 km2
(29.58 sq mi)
466 per km2
(1,208 per sq mi)
34
Burgosmun12,224
(1.77%)
11,6790.87%44.38 km2
(17.14 sq mi)
275 per km2
(713 per sq mi)
26
Cabugaomun37,501
(5.44%)
35,7060.94%95.56 km2
(36.90 sq mi)
392 per km2
(1,016 per sq mi)
33
Candoncity (CC)60,623
(8.79%)
57,8840.88%103.28 km2
(39.88 sq mi)
587 per km2
(1,520 per sq mi)
42
Caoayanmun19,861
(2.88%)
18,5511.31%17.42 km2
(6.73 sq mi)
1,140 per km2
(2,951 per sq mi)
17
Cervantesmun17,211
(2.50%)
16,5730.72%234.70 km2
(90.62 sq mi)
73 per km2
(190 per sq mi)
13
Galimuyodmun10,748
(1.56%)
10,0111.36%34.40 km2
(13.28 sq mi)
312 per km2
(809 per sq mi)
24
Gregorio del Pilarmun4,875
(0.71%)
4,2192.79%41.66 km2
(16.09 sq mi)
117 per km2
(303 per sq mi)
7
Lidliddamun4,647
(0.67%)
4,3981.05%33.84 km2
(13.07 sq mi)
137 per km2
(356 per sq mi)
11
Magsingalmun30,792
(4.46%)
28,3021.62%84.98 km2
(32.81 sq mi)
362 per km2
(938 per sq mi)
30
Nagbukelmun5,259
(0.76%)
4,9381.21%43.12 km2
(16.65 sq mi)
122 per km2
(316 per sq mi)
12
Narvacanmun44,006
(6.38%)
42,8030.53%122.21 km2
(47.19 sq mi)
360 per km2
(933 per sq mi)
34
Quirinomun8,573
(1.24%)
8,5350.08%240.10 km2
(92.70 sq mi)
36 per km2
(92 per sq mi)
9
Salcedomun11,288
(1.64%)
10,9350.61%103.44 km2
(39.94 sq mi)
109 per km2
(283 per sq mi)
21
San Emiliomun7,407
(1.07%)
7,427-0.05%141.44 km2
(54.61 sq mi)
52 per km2
(136 per sq mi)
8
San Estebanmun8,349
(1.21%)
8,0720.64%19.62 km2
(7.58 sq mi)
426 per km2
(1,101 per sq mi)
10
San Ildefonsomun7,787
(1.13%)
7,0751.84%11.35 km2
(4.38 sq mi)
686 per km2
(1,778 per sq mi)
15
San Juanmun26,411
(3.83%)
25,1990.90%64.37 km2
(24.85 sq mi)
410 per km2
(1,063 per sq mi)
32
San Vicentemun12,758
(1.85%)
11,7201.63%12.60 km2
(4.86 sq mi)
1,013 per km2
(2,625 per sq mi)
7
Santamun15,340
(2.22%)
15,1060.29%109.10 km2
(42.12 sq mi)
141 per km2
(364 per sq mi)
26
Santa Catalinamun13,945
(2.02%)
13,5970.48%9.68 km2
(3.74 sq mi)
1,441 per km2
(3,729 per sq mi)
9
Santa Cruzmun39,868
(5.78%)
37,9110.96%88.78 km2
(34.28 sq mi)
449 per km2
(1,163 per sq mi)
49
Santa Luciamun25,402
(3.68%)
24,9810.32%49.72 km2
(19.20 sq mi)
511 per km2
(1,323 per sq mi)
36
Santa Mariamun30,321
(4.40%)
28,5971.12%63.31 km2
(24.44 sq mi)
479 per km2
(1,241 per sq mi)
33
Santiagomun18,759
(2.72%)
17,9580.83%46.36 km2
(17.90 sq mi)
405 per km2
(1,048 per sq mi)
24
Santo Domingomun27,975
(4.06%)
27,5960.26%55.49 km2
(21.42 sq mi)
504 per km2
(1,306 per sq mi)
36
Sigaymun2,737
(0.40%)
2,4192.38%81.55 km2
(31.49 sq mi)
34 per km2
(87 per sq mi)
7
Sinaitmun25,640
(3.72%)
25,4270.16%65.56 km2
(25.31 sq mi)
391 per km2
(1,013 per sq mi)
44
Sugponmun4,585
(0.66%)
3,8203.54%57.11 km2
(22.05 sq mi)
80 per km2
(208 per sq mi)
6
Suyomun11,446
(1.66%)
10,6221.43%124.00 km2
(47.88 sq mi)
92 per km2
(239 per sq mi)
8
Tagudinmun39,277
(5.70%)
38,1220.57%151.19 km2
(58.37 sq mi)
260 per km2
(673 per sq mi)
43
Vigancity (CC), capital53,879
(7.81%)
49,7471.53%25.12 km2
(9.70 sq mi)
2,145 per km2
(5,555 per sq mi)
39
Ilocos Sur Total689,668658,5870.88%2,596.00 km2
(1,002.32 sq mi)
266 per km2
(688 per sq mi)
768
Historical population

The population of Ilocos Sur grew from 338,058 in 1960 to 689,668 in 2015, an increase of 351,610 people. The latest census figures in 2015 denote a positive growth rate of 0.88%, or an increase of 31,081 people, from the previous population of 658,587 in 2010.

Census datePopulationGrowth rate
1903 Mar 2189,572
1918 Dec 31247,4581.70%
1939 Jan 1271,5320.47%
1948 Oct 1276,2780.18%
1960 Feb 15338,0581.79%
1970 May 6385,1391.28%
1975 May 1419,7761.74%
1980 May 1443,5911.11%
1990 May 1519,9661.60%
1995 Sep 1545,3850.90%
2000 May 1594,2061.86%
2007 Aug 1633,1380.88%
2010 May 1658,5871.44%
2015 Aug 1689,6680.88%

Notes

  1. Unless otherwise specified, population count (excluding percentages) and land area figures are derived from the Philippine Statistics Authority.
  2. Maps utilize OpenStreetMap data available under the Open Data Commons Open Database License.
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