San Ildefonso, Ilocos Sur


', officially the ', is a of the Philippines| in the province of,. According to the, it has a population of people.
The town is rich in rice, corn, sugarcane, malunggay, katuday & fruit-bearing trees such as star apple, chico, mango, camachile & atis. Its main product is basi, a wine made from fermented sugarcane juice; as well as cane vinegar. They also make nutritious ice cream made up of vegetables in Barangay Bungro, and is being popularized by the town's local government.
San Ildefonso is from Metro Manila and from Vigan City, the provincial capital.

Etymology

San Ildefonso, like many other places in the provinces at the beginning of the Spanish Regime, did not have a name. Sometime in 1625, its inhabitants decided to give it a name, but nothing came out after more than five hours of discussions. So while thinking of a name, they decided to go fishing for a week. And while preparing to go fishing, they saw a box floating not far from shore. Wading to reach the box and carrying it ashore, they opened the box to find a statue of Saint Ildephonsus. The young women of the place carried the statue to the center of the village, where it was enshrined in a small hut for many years. He became the patron saint of the municipality, and his name was decided to become the name of the fledgling municipality.
San Ildefonso was a former rancheria of Bantay before it became a municipality, but because of its size it was annexed to Santo Domingo as a barrio. In 1921, Assemblyman Elpidio Quirino worked to convert San Ildefonso into a municipality again.

Barangays

San Ildefonso is politically subdivided into 15 barangays.

Demographics

In the, the population of San Ildefonso, Ilocos Sur, was people, with a density of.

Local government

Municipal Officials Year 2000-2013:
On September 28, 2007, San Ildefonso officials commemorated the Basi Revolt. Recently, the Sangguniang Bayan of San Ildefonso approved a resolution declaring September 16 as a non-working holiday and named the old road in Barangay Gongogong as Ambaristo street in honor of Pedro Ambaristo, leader of the Basi Revolt. Mayor Christian Purisima enrolled basi as their entry into the “One Town; One Product” program of Governor Savellano.