Breadcrumb Home / About Us / Programs / OpenData Municipal Information & Data Analysis System The Municipal Information & Data Analysis System (MIDAS) is a web-based tool that provides access to raw municipal Financial Information Return (FIR) schedule data for all Ontario municipalities. The FIR is the main data collection tool used by the Ministry of Municipal Affairs to collect financial and statistical information on municipalities. MIDAS converts FIR data into reports. Municipalities - At large vs Ward List of municipalities that are At large or Ward, or both. Status at 2018 Municipal Elections. Seats on Council The chart illustrates the number of municipalities with different number of council seats. There is a minimum of five members of council, one of whom is the head of council. 45% or 195 of all 444 municipalities in Ontario have a council size of 5 members.