However, accounts from Pigafetta on the Magellan voyage indicates a certain island in Leyte recorded as 'Cenalo' along with the recorded 'Hinnangar' (Hinunangan), and 'Abarien' (Cabalian), which in a new presentation by Greg Hontiveros on the First Mass controversy published in 2008, designated it to the Hingatungan Point in the town and therefore not an island as the account indicates.

Silago was once part of the Municipality of Hinunangan, and under its political jurisdictions, even during World War I and II.

During World War II, Silago was chosen as the site of USS Nautilus (SS-168) submarine landing of American military arms and equipment and goods for the Leyte guerillas.

[6] After the Second World War, Silago became more progressive and had increased its population, and thus became the biggest barangay of Hinunangan.

In 1948, the Secretary of National Defense Ruperto Kangleon took efforts for the conversion of barrio Silago to a municipality.

This was made possible also through the invaluable services and voluntary effort extended by Canuto Capapas and Apolonio A. Lucero by donating real properties as lands to meet the requirements of becoming a municipality.

Silago got her name from the word “murcielago” which is a Spanish term for bat, because of this species' dominance in the locality.

Along the coastal barangays of the town, there are clean beaches and a structure designed by nature lying in the town's deep blue sea known as Pelada Rock, also locally known as “Batong Dako" meaning large rock, which was occupied and utilized as a camp by the Japanese Imperial Army during the Second World War.

The interior of Silago is mountainous, in which is the town's vast forest, home of the wild pigs locally known as “Baboy Ihas”.

Giant bats and troops of long-tailed macaque still abound in the town's forested mountain, mostly near the barangay of Katipunan.

Kalimpyo, kahimsug ug kalinaw, mao ang dalan sa Kalambuan, Ug kining akong kinabuhi ihalad ko kanimo Silago, Luha sa kagul-anan modagayday kung ikaw pasipad-an, Kalipay og katawa ang matagamtaman, Kung ang bidlisiw sa kalampusan makit-an.

Cleanliness, Well-being, and Peace, is what you bring to Progress, And I'll give my life to you, Silago, The tears of anguish would flow away if you are harmed, Joy and laughter would be experienced, If the shine of success would be seen.