The highest MAE % in the Gampaha Electoral District and Sri Lanka election was in 2005, while the lowest MAE % recorded was in the 1989 Gampaha Electoral District and Sri Lanka election.
The following candidates were elected: Sirimavo Bandaranaike (SLFP), 214,390 preference votes (pv); Anura Bandaranaike (SLFP), 107,177 pv; Joseph Michael Perera (UNP), 104,094 pv; John Amaratunga (UNP), 90,797 pv; Ranil Wickramasinghe (UNP), 86,477 pv; Sarath Chandra Rajakaruna (UNP), 80,154 pv; Illukpitiya Mudiyanselage Peter Paul Perera (UNP), 63,602 pv; Lakshman Jayakody (SLFP), 62,652 pv; Wijayapala Mendis (UNP), 59,235 pv; Jayasinghe Muhandiram Donald Dissanayake (UNP), 56,610 pv; Mahindra Suransinghe Wijerathna (UNP), 52,738 pv; Jeyaraj Fernandopulle (SLFP), 51,485 pv; Anura Pradeep (SLFP), 47,550 pv; Hapangama Mahen Gunasekera (UNP), 44,630 pv; Ariyarathna Jayathilaka (UNP), 39,893 pv; Reggie Padmasena Ranatunga (SLFP), 37,163 pv; and Sakalasooriya Appuhamilage Sardhatissa Sakalasooriya (SLFP), 36,363 pv. The Sri Lankan presidential election of 2005 was the fifth presidential election of Sri Lanka. Results of the 5th presidential election held on 17 November 2005 for the district: 
