Land Area (in hectares.): 823.80
Population (as per NSO 2010) 3,915
Punong Barangay: TRINIDAD R. SORIANO
Ronald A. Leones
Herminigildo S. Ginez
Editha C. dela Cruz
Rey A. Ragudos Sr.
Melvin S. Estrada
Alberto P. Quintinita
Gerardo A. Garcia
Barangay Secretary: Zenaida B. Saringan
Barangay Treasurer: Arlida D. Ranches
Once long ago, some farmers migrated to Alaminos from the San Vicente, Ilocos Sur. They settled at the southeastern part of the town where they formed a small community and called it 'Namvicentian' or 'place where people from San Vicente converged'. Years later, it was renamed San Vicente.