Breadcrumb Home / About Us / Programs / OpenData Size of Municipal Council and Population This data set includes a list of all municipalities, by tier (Lower Tier, Separated, Single Tier and Upper Tier), size of council for the 2018-22 election year, including population (2016 Census) Youth Population The data set contains the youth population per municipality. Source: MPAC and Stats Can and 2019 FIRS. Municipal Populations Number of Municipalities by Population Range Number of Municipalities by Tier 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.