Kudumbimalai is a region in the west of Batticaloa District, Sri Lanka. It consists of a rock formation and a thick jungle. The area is very close to Polonnaruwa District border.
Kudumbimalai in Tamil translates to Hair-knot-rock. Another Tamil name for the region is Thoppikkal, which translates to Hat-rock, hence in Sinhala it is called Thoppigala. British colonists from the past named the rock Baron's Cap.