Mathugama (Sinhala: මතුගම, Tamil: மத்துகம) is a semi urban town surrounded by mountains.

Mathugama is part of the Pasdun Korale (Sinhala: පස්දුන් කෝරලේ) (meaning: county of the five yojanas), created when King Parakramabahu the Great drained the Kalu Ganga basin.

In the days of the State Council it comprised the present-day Agalawatta, Bulathsinhala and Matugama constituencies.

Since 1989 it has been an electoral division of the Kalutara District, not a constituency sending a member to parliament in its own right.

The constituency was represented in the State Council by: Bounded by: North - Kalu Ganga river East - Bulathsinhala and Agalawatte electorates South - Bentota Ganga river West - Kalutara and Beruwala electorates.