The barangay's total land area is 683 hectares (1,690 acres). According to the 2015 census, it has a population of 768. In the 2013 electoral roll, it had 530 registered voters, meaning that 69% of the population are aged 18 and over.

Ilihan celebrates its annual fiesta on 15 May in honor of their patron saint.

Located in the southern tip of the municipality, Ilihan is bounded to the north and east by San Pascual, to the west by Villa Teresita, and to the south by the municipality of Alicia. It is 18 km (11 mi) from the town center, Poblacion.

Hundreds of years ago, pygmies settled in the northeastern forest of Bohol. Beneath the forest, three caves can be found. Skulls, jars, beds, plates, and other early tools were once excavated from these caves. One of the unearthed bodies had a name of Okag, written on stone in Baybayin script. Larger portions of these caves are still inaccessible. This is how Ilihan got its name: it means an inaccessible geological feature.

Formerly Ilihan was a sitio of barangay San Pascual. It became a separate barrio in 1910.

There are seven puroks overseen by the elected kagawads.

People in the barangay are mostly farmers who live by planting rice, camote, cassava, banana, and other vegetables. Some till agricultural smallholdings. Some of the population also weave mats, and produce palm oil and coconut products.

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Wikipedia