Before the influx of the Visayan settlers particularly the Boholanos into the floodplain which is now Libasan, the indigenous people, the Mansakas lived only in the fringes and up the mountains surrounding the plain, the place was a thickly forested area where giant trees such as : Tu-og, Narra, Talisay, Mambog, etc. grow to towering heights.
Significantly, a medium size growing tree existed in grooves along the creeks bank. It was called Libas, its leaves are sour to the taste and used as food seasoning and herbal medicine. The fruits are sourest-sweet when ripe, birds, deers, wild pigs and even human relish on the ripe fruits.
In August or September Mansakas from as far as Mainit and Andili would come to visit their friends and relatives, it is the ripening time of the Libas fruits which coincides with the upland rice harvest. The “ KALIBASAN” becomes the area of interest as flocks of birds and hordes of wild pigs and deers converge in the place to feed on the ripe Libas fruits, it became a rich hunting ground for the season.
Kalibasan became synonymous to good hunting ground to distinguished it from adjoining areas, later on “ KALIBASAN” was shortened to mere Libasan and the name was used to designate the creek but it was expanded and the whole flood plain down to the present Sta. Maria was named Libasan.
Barangay Libasan was registered on the 23rd day of July 1957, through Republic Act 2038.