A
- (Kalutara District) Athagama
- (Gampaha District) Ambalanwatta
- (Kalutara District) Avariwatta
- (Colombo District) Avissawella
- (Kalutara District) Atweltota
- (Colombo District) Athurugiriya
- (Kalutara District) Athura
- (Gampaha District) Atupotdeniya
- (Kalutara District) Atulugama Sinhalese
- (Colombo District) Attidiya
- (Gampaha District) Attanagalla
- (Colombo District) Atigala
- (Colombo District) Atgalgoda
- (Kalutara District) Atale
- (Gampaha District) Assennawatta
- (Gampaha District) Asgiriya
- (Gampaha District) Asgiriwalpola
- (Colombo District) Arukwatta North
- (Gampaha District) Arupassa
- (Gampaha District) Arukgoda
- (Colombo District) Arapangama
- (Colombo District) Arangala
- (Kalutara District) Aramanagolla
- (Gampaha District) Arambegodella
- (Gampaha District) Arambe
- (Gampaha District) Aramangoda
- (Kalutara District) Arakawila
- (Kalutara District) Arakagoda
- (Gampaha District) Anuragoda
- Ver todas