San Pablo is a philippine municipality in the province Isabela in Region II Cagayan Valley which belongs to the Luzon group of islands. The municipality San Pablo is seated about 40 km north-west of province capital Ilagan and about 337 km north-north-east of Philippine main capital Manila.
San Pablo is a 2nd class municipality. Regarding urbanization San Pablo is classified as partly urban. San Pablo occupies an area of 637.90 km². By the end of 2007 San Pablo was the home of 20,561 residents. Thus by average 32.23 people are living on one km².
Administratively the Municipality of San Pablo is subdivided into 17 barangays. One forms the center of the city wheras the other 16 are in the outlying areas. Some of them are even several kilometers away from the center of the Municipality. The most populous are Guminga, Caralucud, Poblacion, Simanu Sur, Annanuman, Minanga Norte, Caddangan/Limbauan, Auitan, Minanga Sur, Calamagui, San Jose, Ballacayu, Bungad, Dalena, Tupa (San Vicente).
Among the bigger cities and municipalities in the neighborhood of San Pablo there are Tuguegarao City (Cagayan) 32 km west-north-west, Ilagan 40 km south-south-east, City Of Cauayan 64 km south-south-west, City Of Santiago 97 km south-south-west, City Of Isabela (City Of Isabela) 56 km south, City Of Tabuk (Kalinga) 55 km west, Solana (Cagayan) 37 km west-north-west, Echague 92 km south-south-west, Alicia 81 km south-south-west as well as 50 km north of San Pablo the municipality Baggao (Cagayan).