During the period 1751–1754, Loay was a small village called Santissima Trinidad located at the strip of the
Loboc River, as mentioned in the accounts of Father Juan . As a
visita, it formerly belonged to the
Municipality of Loboc. It was separated from the Loboc mission in 1795, although some state 1815 as the foundation date, and reflects that it became an independent parish in 1799. The 1818 Census recorded 1,614 native families and 3 Spanish-Filipino families living in Loay. The
church and belfry of Loay were severely damaged by the
2013 earthquake. On April 27, 2022, the old Clarin Bridge carrying
National Route 850 (N850) over the
Loboc River in Loay collapsed, killing 4 people and injuring 15. The bridge was damaged during the 2013 earthquake and still being used while a new replacement bridge was under construction next to it. One possible cause was the stationary traffic on the bridge that exceeded its capacity. ==Geography==