Glan is a philippine municipality in the province Sarangani in Region XII SOCCSKSARGEN which belongs to the Mindanao group of islands. The municipality Glan is seated about 31 km south-south-west of province capital Alabel and about 1,079 km south-south-east of Philippine main capital Manila.
Glan is a 1st class municipality. Regarding urbanization Glan is classified as partly urban. Glan occupies an area of 610.30 km². By the end of 2007 Glan was the home of 102,676 residents. Thus by average 168.24 people are living on one km².
Administratively the Municipality of Glan is subdivided into 31 barangays. One forms the center of the city wheras the other 30 are in the outlying areas. Some of them are even several kilometers away from the center of the Municipality. The most populous are Rio Del Pilar, Batotuling, San Jose, San Vicente, Batulaki, Sufatubo, Cross, Calpidong, Lago, Mudan, Gumasa, Tango, New Aklan, Congan, Kapatan.
Among the bigger cities and municipalities in the neighborhood of Glan there are Sultan Kudarat (Nuling) (Maguindanao) 100 km north-west, General Santos City (Dadiangas) (South Cotabato) 32 km north, Malita (Davao Del Sur) 69 km north-north-east, Polomolok (South Cotabato) 46 km north-west, Malungon 57 km north, City Of Koronadal (South Cotabato) 85 km north-west, Banga (South Cotabato) 77 km north-west, Alabel 31 km north-north-east, Surallah (South Cotabato) 80 km north-west as well as 19 km north-north-east of Glan the municipality Malapatan.