It is the smallest municipality in the province both by population and by land area, and even by revenue.

[3] Before its creation into an independent municipality, Lezo was a barrio in Kalibo called Guicod derived from the word "Guicab" which means "a cavern in a creek where eels were in abundance", and was also known as Tierra Alta meaning a "high land" because the town center was not inundated during the great flood of the early 19th century.

[5] When the Americans came in 1899, the military government appointed Felix Kimpo as head of the Calivo (covering the present territory of Kalibo, Numancia and Lezo).

720 of the Philippine Commission, Lezo, along with Numancia, and Banga was annexed to Kalibo for decreased of revenue collections.

With several petitions by the residents over the years to separate from Numancia, President Manuel Quezon signed Executive Order No.

[7] The inauguration of Lezo as a separate municipality was scheduled in 1942, but due to the outbreak of World War II it was deferred to January 1, 1945.