| Flag Size: | 120x80px | ||
| Seal Size: | 80px | ||
| Image Map1: |
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| Pushpin Map: | Philippines | ||
| Pushpin Label Position: | left | ||
| Pushpin Map Caption: | Location within the | ||
| Subdivision Type: | Country | ||
| Subdivision Name: | Philippines | ||
| Subdivision Type1: | Region | ||
| Subdivision Type2: | Province | ||
| Subdivision Type3: | District | ||
| Established Title: | Founded | ||
| Parts Type: | Barangays | ||
| Parts Style: | para | ||
| P1: | (see Barangays) | ||
| Leader Name: | Darwin E. Bajada | ||
| Leader Title1: | Vice Mayor | ||
| Leader Name1: | Erma A. Perez | ||
| Leader Name2: | Raul C. Tupas | ||
| Leader Title3: | Municipal Council | ||
| Leader Name4: | voters (electorate_point_in_time}}|) | ||
| Elevation Max M: | 812 | ||
| Elevation Min M: | 0 | ||
| Population Density Km2: | auto | ||
| Population Blank1 Title: | Households | ||
| Timezone: | PST | ||
| Utc Offset: | +8 | ||
| Postal Code Type: | ZIP code | ||
| Demographics Type1: | Economy | ||
| Demographics1 Title2: | Poverty incidence | ||
| Demographics1 Info2: | % | ||
| Demographics1 Title3: | Revenue | ||
| Demographics1 Title4: | Revenue rank | ||
| Demographics1 Title5: | Assets | ||
| Demographics1 Title6: | Assets rank | ||
| Demographics1 Title7: | IRA | ||
| Demographics1 Title8: | IRA rank | ||
| Demographics1 Title9: | Expenditure | ||
| Demographics1 Title10: | Liabilities | ||
| Demographics Type2: | Service provider | ||
| Demographics2 Title1: | Electricity | ||
| Demographics2 Title2: | Water | ||
| Demographics2 Title3: | Telecommunications | ||
| Demographics2 Title4: | Cable TV | ||
| Blank1 Name Sec1: | Native languages | ||
| Blank2 Name Sec1: | Crime index | ||
| Blank1 Name Sec2: | Major religions | ||
| Blank2 Name Sec2: | Feast date | ||
| Blank3 Name Sec2: | Catholic diocese | ||
| Blank4 Name Sec2: | Patron saint | ||
San Dionisio, officially the Municipality of San Dionisio (Hiligaynon: Banwa sang San Dionisio, Tagalog: Bayan ng San Dionisio), is a 4th class municipality in the province of Iloilo, Philippines. According to the 2020 census, it has a population of 39,048 people.
San Dionisio is north of Iloilo City and east of Roxas City. The Quiniluban Island, Tago Island and Igbon Island, extinct valconic islands known for coral reef scuba diving and beach ecotourism, lie in the east across the Concepcion Bay. The Mount Opaw, with the clear views of ocean and islands, is the tallest range with gentle slope with a single peak with trails in several directions to ascent.
See also: Madja-as.
During the Spanish Colonization of Philippines, a native leader named "Dionisio" had cleared the forest land to create a settlement called "Lakdayan". In 1877 Spanish arrived and renamed "Lakdayan" to "Dionisio" in the honor of humble fisherman founder of the settlement. Spanish converted the natives and appointed St. Vincent Ferrer as Patron Saint of the settlement. Spanish set up the municipality at Concepcion, of which Dioniso was a part of. During Spanish times, the head of the local government of Concepcion was titled "Kapitan" (captain) and the subordinate leaders in San Dionisio were titled "Tenientes" (lieutenant) and hereditary Cabeza de Barangay (head of barangay). Eventually Sara was carved out of Concepcion to establish an eponymous municipality, which also included Dionisio as one of the constituent barangay of Sara. In 1920, San Dionisio municipality was established after carving it out of Sara municipality.
San Dionisio is politically subdivided into 29 barangays. Each barangay consists of puroks and some have sitios.
San Dionisio has intermediate tropical climate, relatively dry from December to April and wet for the rest of the year. Northeast monsoon and trade winds cause the dry and sunny weather. Southeast monsoons and cyclone storms cause the wet and stormy conditions. January is the coldest month during the relatively cool tropical period from December to February. April to June summer season has the warmest temperature. High tropical temperature and the sea on eastern side cause the high relative humidity.
In the 2020 census, the population of San Dionisio, Iloilo, was 39,048 people, with a density of NaNPD/km2NaNPD/km2.