The extent of Divisional Secratariat Mirigama consist of 190 squaire kilometers , Along with the ma oya river, in northern. Side B situated kurunegala District in the boarder line. northern Boarder line covers kurunegala district and sabaragamuwa province (kegalla district) boarder line. southern part covers with aththanagalla division and western part covers with both aththanagalla and Divlapiriya Divisions. Mirigama Divisional secretariat is the second largest secretarial division in gampaha district. It contains 149 grama niladari divisions.
