South Dum Dum, city in eastern India, in southeastern Bangla State, on the southwestern border of the Kolkata metropolitan area. The city has a few industries but is mostly a suburban community of Kolkata. An underground metro system connects South Dum Dum with central Kolkata and areas south of there. The city is also connected to Kolkata by road and fast-moving electric trains. Kolkata's airport is located in South Dum Dum. Population (1991) 232,811.