 Ontario has 30 upper-tier municipalities that comprise multiple lower-tier municipalities, which have a total population of 6,622,900, a total land area of .These upper-tier municipalities include 19 counties, 3 united counties and 8 regional municipalities or regions, all of which represent 30 of Ontario's 49 census divisions.Regional governments are responsible for arterial roads, health services, policing, region-wide land use planning and development, sewer and water systems, social services, transit, and waste disposal, whereas county governments have the lesser responsibilities of arterial roads, county land use planning, health services, and social services.