Bolan district lies between 29 24' 10" N and 67 4' 44" E. Area wise Bolan district is the largest of all four districts in Nasirabad Division. The total area of Bolan is 8,036 sq.km.

Bolan district comprises both plain and hilly areas. The hilly areas are in the north and the west of the district. In the north the hills range from Kolpur to Kondalani, a Bolan Levy check post, from where 3.5 km onward the road travels into the plain area. The hilly areas in the west are confined to a part of Sanni tehsil. The hilly areas are solid rocks with a long chain of mountains near Kolpur, with peaks varying from 1,000 to 3,000 metres. The plain area in the south and east of Bolan district is formed of alluvial soil. Part of the plain is a non-sandy desert area.