Thimbirigasyaya Divisional Secretariat is a Divisional Secretariat of Colombo District, of Western Province, Sri Lanka.
There are 20 Grama Nildhari Divisions under the divisional secretariate. 3 Medical Officer of Health(MOH) Areas (Colombo West, Colombo East, and Borella) and 2 Educational Offices (Colombo South and Borella) serve this region.
Established on 03-March-1999 through the public administration decentralization initiative.
There are 20 GN divisions in Thimbirigasyaya Divisional Secretariat.