We divide Ontario into four service regions. Each region has an associated regional office and serves specific areas of the province as listed below.
Southeast Region: counties of Frontenac; Haliburton; Hastings; Kawartha Lakes; Lanark; Leeds and Grenville; Lennox and Addington; Muskoka; Northumberland; Peterborough; Prescott and Russell; Prince Edward; Renfrew; Stormont, Dundas and Glengarry; the district of Parry Sound, and the regional municipalities of Durham and Ottawa.
Southwest Region: counties of Brant, Bruce, Chatham-Kent, Dufferin, Elgin, Essex, Grey, Haldimand, Huron, Lambton, Middlesex, Norfolk, Oxford, Perth, Simcoe, Wellington, and the regional municipalities of Halton, Hamilton, Niagara, Peel, Toronto, Waterloo, York.
Northeast Region: districts of Algoma, Cochrane, Nipissing, Manitoulin, Parry Sound, Sudbury, Timiskaming, and the Regional Municipality of Sudbury.
Northwest Region: districts of Rainy River, Thunder Bay, Fort Frances, Kenora.