Unisan is a philippine municipality in the province Quezon in Region IV-A CALABARZON which belongs to the Luzon group of islands. The municipality Unisan is seated about 44 km east of province capital Lucena City and about 135 km south-east of Philippine main capital Manila.
Unisan is a 4th class municipality. Regarding urbanization Unisan is classified as partly urban. Unisan occupies an area of 124.15 km². By the end of 2007 Unisan was the home of 23,911 residents. Thus by average 192.60 people are living on one km².
Administratively the Municipality of Unisan is subdivided into 36 barangays. 4 compose the center of the city wheras the other 32 are in the outlying areas. Some of them are even several kilometers away from the center of the Municipality. The most populous are Burgos, General Luna, Mairok Ilaya, Rizal Ibaba, Mairok Ibaba, Rizal Ilaya, San Roque, Tagumpay, Plaridel, Socorro, Pagaguasan, Cabulihan Ibaba, Bonifacio, Mabini, Balanacan.
Among the bigger cities and municipalities in the neighborhood of Unisan there are Lipa City (Batangas) 92 km west, San Pablo City (Laguna) 77 km west-north-west, City Of Calamba (Laguna) 99 km west-north-west, Lucena City 43 km west, Sariaya 53 km west-north-west, City Of Tanauan (Batangas) 96 km west-north-west, Candelaria 64 km west, Santa Cruz (Laguna) 77 km north-west, Rosario (Batangas) 87 km west as well as 92 km west-north-west of Unisan the municipality Los Baņos (Laguna).