San Fabian, officially the Municipality of San Fabian, is a 1st class municipality in the province of Pangasinan, Philippines. According to …San Fabian, officially the Municipality of San Fabian, is a 1st class municipality in the province of Pangasinan, Philippines. According to the 2020 census, it has a population of 87,428 people. The town got its name after Saint Fabian during the Spanish era.