List of census divisions of Ontario
Counties
Counties have fewer responsibilities than regions, as the lower-tier municipalities (cities, towns, villages, townships) within the counties typically provide the majority of municipal services to their residents.

List of census divisions of Ontario

Section Title: Counties
Table Section Text: Counties have fewer responsibilities than regions, as the lower-tier municipalities (cities, towns, villages, townships) within the counties typically provide the majority of municipal services to their residents.

Census division	Population (2016)	Area (km²)	Density (/km²)	Regional seat	Secondary region	Primary region

Bruce County	68,147	4,090.20	16.7	Walkerton	Southwestern	Southern

Dufferin County	61,735	1,486.44	41.5	Orangeville	Central	Southern

Elgin County	88,978	1,881.03	47.3	St. Thomas	Southwestern	Southern

Essex County	398,953	1,850.90	215.5	Essex	Southwestern	Southern

Frontenac County	150,475	3,787.76	39.7	Kingston	Eastern	Southern

Grey County	93,830	4,513.50	20.8	Owen Sound	Southwestern	Southern

Haliburton County	18,062	4,076.08	4.4	Minden	Central	Southern

Hastings County	136,445	6,103.92	22.4	Belleville	Central	Southern

Huron County	59,297	3,399.27	17.4	Goderich	Southwestern	Southern

Lambton County	126,638	3,002.25	42.2	Wyoming	Southwestern	Southern

Lanark County	68,698	3,035.64	22.6	Perth	Eastern	Southern

United Counties of Leeds and Grenville	100,546	3,382.89	29.7	Brockville	Eastern	Southern

Lennox and Addington County	42,888	2,839.68	15.1	Napanee	Eastern	Southern

Middlesex County	455,526	3,317.27	137.3	London	Southwestern	Southern

Northumberland County	85,598	1,905.15	44.9	Cobourg	Central	Southern

Perth County	76,796	2,218.52	34.6	Stratford	Southwestern	Southern

Peterborough County	138,236	3,848.20	35.9	Peterborough	Central	Southern

United Counties of Prescott and Russell	89,333	2,004.47	44.6	L'Orignal	Eastern	Southern

Renfrew County	102,394	7,448.57	13.7	Pembroke	Eastern	Southern

Simcoe County	479,650	4,859.64	98.7	Midhurst	Central	Southern

United Counties of Stormont, Dundas and Glengarry	113,429	3,309.87	34.3	Cornwall	Eastern	Southern

Wellington County	222,726	2,660.57	83.7	Guelph	Southwestern	Southern

Sentence(s)

Wellington County is located in Southwestern Ontario.

final_sentence: Wellington County is located in Southwestern Ontario.