ALAMINOS began as a barrio of San Pablo City which was then only a town belonging to the province of Batangas. It's initial name was TRINCHERA denoting the presence of long and deep ditches. The early inhabitants of Trinchera were believed to be insorectors and possibly fugitives who took advantage of the numerous trenches for hiding and as well as defense against Spanish authority.

    Sometime in 1873 when a certain DON ANDRES PEÑALOZA was the gobernadorcillo (equivalent of mayor) of the town of San Pablo, Trinchera was formally separated and become a pueblo (town) but remained part of the province of Batangas.

    DON CIRILO BAYLON , a wealthy resident of Trinchera and with a good command of Spanish, invited Captain General JUAN DE ALAMINOS NIVERA , the chief executive of the province of Batangas whose capital was Lipa. The Captain General accepted the invitation and came in colorful carriage drawn by two horses. With DON CIRILO BAYLON leading, he was warmly received by the residents of Trinchera. Doña Gregoria Baylon, the younger sister of Don Cirilo Baylon presented bouquet of fresh flowers to the Captain-General.

    During the program in honor of the Captain-General and his party, Don Cirilo Baylon presented the petition of the residents asking the TRINCHERA be made into a duly organized and reorganized town. The petition was read to public and the Captain-General gave his assurance to consider their wish favorably. In less than two months the official paper proclaiming TRINCHERA as a new pueblo or town came from Lipa, then the seat of power of the province of Batangas.

    At the same time, DON CIRILO BAYLON was appointed the first gobernadorcillo or town mayor in concurrent capacity as Capitan de los Constables de Pueblo or the equivalent of the local police chief. In appreciation to CAPTAIN-GENERAL JUAN DE ALAMINOS RIVERA , the new pueblo was named ALAMINOS in 1873 and remained part of the province of Batangas until 1903.

    The religious Patron of ALAMINOS is NUESTRO SEÑORA DEL PILAR and its town Fiesta is celebrated on October 12 of the year.

    At present Alaminos has 15 Barangays, four at the town proper and eleven regular barrios. Based on May 08, 1995 election, the number of voters of Alaminos is 18,729 implying that its actual population is something like 36,456. It has a land area of 54.68 sq. km. and situated 78 kilometers east of Manila.