M
- (Gampaha District) Matammana
- (Gampaha District) Matalana
- (Gampaha District) Matagoda
- (Kalutara District) Maswila
- (Gampaha District) Marapola
- (Kalutara District) Marakkalahawatta
- (Gampaha District) Mapalangedara
- (Colombo District) Manning Town
- (Kalutara District) Mannawatta
- (Gampaha District) Maningamuwa
- (Kalutara District) Manhandiya
- (Gampaha District) Mangedara
- (Gampaha District) Mangalatiriya
- (Gampaha District) Mandawala South
- (Gampaha District) Mandawala North
- (Gampaha District) Manaweriya
- (Colombo District) Mampe North
- (Gampaha District) Malwathu Hiripitiya
- (Gampaha District) Malwana
- (Gampaha District) Mallehewa
- (Gampaha District) Mallawagedara
- (Colombo District) Maligawatta
- (Kalutara District) Maligahena
- (Kalutara District) Malewangoda
- (Kalutara District) Malewana
- (Kalutara District) Malegoda
- (Colombo District) Malapalla
- (Kalutara District) Malamulla
- (Colombo District) Malagala
- (Gampaha District) Maladeniya