San Juan, Province of Ilocos Sur

Summary data
Typemunicipality
Island groupLuzon
RegionIlocos Region (Region I)
ProvinceIlocos Sur
Barangay count32
Postal code2731
Coastal/Landlockedcoastal
Marine waterbodiesSouth China Sea
Philippine major island(s)Luzon
Area (2013)64.37 km2 (24.85 sq mi)
Population (2020)26,674
Density (2020)414 / km2 (1,073 / sq mi)
Coordinates17° 45' North, 120° 27' East (17.7422, 120.4583)
Estimated elevation above sea level20.1 meters (65.8 feet)

San Juan, formerly known as Lapog, is a coastal municipality in the province of Ilocos Sur.

The municipality has a land area of 64.37 square kilometers or 24.85 square miles which constitutes 2.48% of Ilocos Sur's total area. Its population as determined by the 2020 Census was 26,674. This represented 3.78% of the total population of Ilocos Sur province, or 0.50% of the overall population of the Ilocos Region. Based on these figures, the population density is computed at 414 inhabitants per square kilometer or 1,073 inhabitants per square mile.

Barangays

San Juan has 32 barangays as shown in the following table.

Demographic profile of barangays
Local government units of San Juan
BarangayPopulation percentage (2020)Population (2020)Population (2015)Change (2015‑2020)Annual Population Growth Rate (2015‑2020)
Asilang1.66%44326567.17%11.42%
Bacsil3.79%1,0121,068-5.24%-1.13%
Baliw3.46%9228597.33%1.50%
Bannuar4.69%1,2501,269-1.50%-0.32%
Barbar5.10%1,3601,486-8.48%-1.85%
Cabanglotan3.80%1,0149664.97%1.03%
Cacandongan1.21%324326-0.61%-0.13%
Camanggaan2.44%6506411.40%0.29%
Camindoroan3.44%91781612.38%2.49%
Caronoan2.51%670673-0.45%-0.09%
Darao1.61%4304173.12%0.65%
Dardarat2.03%542627-13.56%-3.02%
Guimod Norte1.43%3813761.33%0.28%
Guimod Sur3.60%959997-3.81%-0.81%
Immayos Norte2.67%713729-2.19%-0.47%
Immayos Sur0.96%2552377.59%1.55%
Labnig4.26%1,1371,0607.26%1.49%
Lapting4.55%1,2151,1099.56%1.94%
Lira3.33%888896-0.89%-0.19%
Malamin2.62%6996566.55%1.35%
Muraya2.82%7537027.26%1.49%
Nagsabaran3.57%9538966.36%1.31%
Nagsupotan5.30%1,4141,3197.20%1.47%
Pandayan2.16%577797-27.60%-6.57%
Refaro5.05%1,3471,389-3.02%-0.64%
Resurreccion3.80%1,0131,116-9.23%-2.02%
Sabangan2.74%7316718.94%1.82%
San Isidro3.09%825828-0.36%-0.08%
Saoang3.24%8648452.25%0.47%
Solotsolot2.85%760811-6.29%-1.36%
Sunggiam4.24%1,1321,0983.10%0.64%
Surngit1.96%52446612.45%2.50%
San Juan Total26,67426,4111.00%0.21%

Economy

The annual regular revenue of San Juan for the fiscal year of 2016 was 343,214,904.27.

details
Annual regular income of San Juan (2009‑2016)
Fiscal YearAnnual Regular IncomeChange
200948,098,365.16
2010112,454,410.15133.80%
201196,601,647.27-14.10%
2012105,554,631.399.27%
2013101,494,504.46-3.85%
201458,142,290.00-42.71%
2015177,019,059.06204.46%
2016343,214,904.2793.89%

End notes:

  • Annual Regular Income = Locally Sourced Revenue + Internal Revenue Allotment (IRA) Current Year + Other Shares from National Tax Collection
  • Locally Sourced Revenue = Real Property Tax (General Fund) + Tax on Business + Other Taxes + Regulatory Fees + Service/User Charges + Receipts from Economic Enterprises

Demographics

Households

The household population of San Juan in the 2015 Census was 26,403 broken down into 6,477 households or an average of 4.08 members per household.

details
Number of households in San Juan (1990‑2015)
Census dateHousehold populationNumber of householdsAverage household size
20,3194,0015.08
21,2154,3464.88
23,1394,8664.76
23,8045,1564.62
25,1965,9624.23
26,4036,4774.08

Population by age group

According to the 2015 Census, the age group with the highest population in San Juan is 5 to 9, with 2,507 individuals. Conversely, the age group with the lowest population is 75 to 79, with 410 individuals.

details
Population of San Juan by age group (2015 census)
Age groupPopulation (2015)Age group percentage
Under 14491.70%
1 to 41,9847.51%
5 to 92,5079.49%
10 to 142,4259.18%
15 to 192,2998.70%
20 to 242,2398.48%
25 to 292,1037.96%
30 to 341,9297.30%
35 to 391,9037.21%
40 to 441,5906.02%
45 to 491,5015.68%
50 to 541,3605.15%
55 to 591,2064.57%
60 to 649203.48%
65 to 696752.56%
70 to 744681.77%
75 to 794101.55%
80 and over4431.68%
Total26,411100.00%
  • Youth Dependency Ratio: 43.2
  • Old Age Dependency Ratio: 11.71
  • Total Dependency Ratio: 54.91
  • Median Age: 28.10

Historical population

The population of San Juan grew from 7,035 in 1903 to 26,674 in 2020, an increase of 19,639 people over the course of 117 years. The latest census figures in 2020 denote a positive growth rate of 0.21%, or an increase of 263 people, from the previous population of 26,411 in 2015.

details
Population of San Juan (1903‑2020)
Census datePopulationGrowth rate
7,035
9,7912.11%
10,6740.43%
9,777-0.90%
12,6542.29%
14,9871.67%
16,3291.74%
17,4431.33%
20,3281.54%
21,2220.81%
23,1461.88%
23,8080.39%
25,1992.09%
26,4110.90%
26,6740.21%

The total number of registered voters or electorate in San Juan for the year 2019 was 18,038, broken down into 9,141 males and 8,897 females.

Location

The municipal center of San Juan is situated at approximately 17° 45' North, 120° 27' East, in the island of Luzon. Elevation at these coordinates is estimated at 20.1 meters or 65.8 feet above mean sea level.

Distances

Based on the great-circle distance (the shortest distance between two points over the surface of the Earth), the cities closest to San Juan are Vigan, Ilocos Sur, Batac, Ilocos Norte, Laoag, Ilocos Norte, Candon, Ilocos Sur, Tabuk, Kalinga, and San Fernando, La Union. The nearest municipalities are Cabugao, Ilocos Sur, Magsingal, Ilocos Sur, Santo Domingo, Ilocos Sur, Sinait, Ilocos Sur, San Ildefonso, Ilocos Sur, and San Vicente, Ilocos Sur. Its distance from the national capital is 353.19 kilometers (219.46 miles). The following list delineates such distance measurements.

great-circle distance

Nearest towns

Nearest cities

Distance from Manila: 353.19 kilometers (219.46 miles) to the South (S9°E)

Notes

  1. Unless otherwise specified, population count (excluding percentages), household data, and land area figures are derived from the Philippine Statistics Authority.
  2. Data on registered voters is from the Commission on Elections.
  3. Data on annual regular income is from the Bureau of Local Government Finance, Department of Finance
  4. Postal code information is from the Philippine Postal Corporation.
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