OfficialCitySites.org: Canada

Directory of officially sanctioned city, town, county, or district sites across Canada, organized by province. Includes government, chamber of commerce, and tourism association sites.
http://officialcitysites.org/canada.php3

Geographical Names of Canada

Database of place names for Canadian metropolitan areas, cities, towns, villages, unincorporated areas, Indian Reserves, and geographical features like rivers, lakes, and islands. Provides latitude, longitude, and map.
http://geonames.nrcan.gc.ca/

Federation of Canadian Municipalities

Promotes strong and effective municipal governments. Includes member list, history, board of directors, policy and program details, and publications.
http://www.fcm.ca/

Statistical Profile of Canadian Communities

Statistics for all communities from Statistics Canada, based on most recent census data. Includes population, education, income and work, families and dwellings, births and deaths, health, and map information.
http://www12.statcan.ca/english/profil01/PlaceSearchForm1.cfm