18^th and 19^th Century Ontario Counties and Corresponding Districts

Addington
Created in 1792 (merged with Lennox County in 1800)

Midland 1792-1800

Brant
Created in 1851 from Wentworth and Halton Counties

(no corresponding district)

Bruce
Created in 1850

(no corresponding district)

Carleton
Created in 1800 from Dundas and Grenville Counties

Johnstown 1800-1822

Bathurst 1822-1838

Dalhousie 1838-1849

Dufferin
Created in 1874 from Grey, Simcoe and Wellington Counties)

(no corresponding district)

Dundas
Created in 1792

Eastern 1792-1849

Durham
Created in 1792

Home 1792-1802

Newcastle 1802-1849

Elgin
Created in 1851 from Middlesex County

(no corresponding district)

Essex
Created in 1792

Western 1792-1849

Frontenac
Created in 1792

Midland 1792-1849

Glengarry
Created in 1792

Eastern 1792-1849

Grenville
Created in 1792

Eastern 1792-1800

Johnstown 1800-1849

Grey
Created in 1851 from Simcoe County

(no corresponding district)

Haldimand
Created in 1800 from Norfolk

Niagara 1800-1849

Haliburton
Created in 1874

(no corresponding district)

Halton
Created in 1816 from York County (West Riding)

Gore 1816-1849

Hastings
Created in 1792

Midland 1792-1839

Victoria 1839-1849

Huron
Created in 1835 from London District

London 1835-1841

Huron 1841-1849

Kent
Created in 1792

Western 1792-1849

Lambton
Created in 1850 from Kent County

(no corresponding district)

Lanark
Created in 1824 from Leeds County

Bathurst 1824-1849

Leeds
Created in 1792

Eastern 1792-1800

Johnstown 1800 -1849

Lennox
Created in 1792 (merged with Addington County in 1800)

Midland 1792-1800

Lincoln
Created from 1792

Home 1792-1800

Niagara 1800-1849

Middlesex
Created in 1800

London 1800-1849

Norfolk
Created in 1792

Home [part] and Western [part] 1792-1800 

London 1800-1837

Talbot 1837-1849

Northumberland
Created in 1792

Home 1792-1802

Newcastle 1802-1849

Ontario
(comprised of the islands in the St. Lawrence River)

Created in 1792 (abolished in 1800)

Midland 1792-1800

Ontario
Created in 1851 from York County (East Riding)

(no corresponding district)

Oxford
Created in 1800

London 1800-1839

Brock 1839-1849

Peel
Created in 1851 from York County (East Riding)

(no corresponding district)

Perth
Created in 1849

Huron 1849

Peterborough
Created in 1838 from Durham and Northumberland Counties

Newcastle 1838-1841

Colborne 1841-1849

Prescott
Created in 1800 from Glengarry County

Eastern  1800-1816

Ottawa 1816-1849

Prince Edward
Created in 1792

Midland 1792-1834

Prince Edward 1834-1849

Renfrew
Created in 1845 from Lanark County

Bathurst 1845-1849

Russell
Created in 1800 from Stormont County

Eastern 1800-1816

Ottawa 1816-1849

Simcoe
Created in 1792

Home 1821-1843

Simcoe 1843-1849

Stormont
Created in1792

Eastern 1792-1849 

Victoria
Created in 1851 from Peterborough County

(no corresponding district)

Waterloo
Created in 1840 from Halton, Huron and Simcoe Counties

Wellington 1840-1849

Welland
Created in 1845 from Lincoln County

Niagara 1845-1849

Wellington
Created in 1851 from Waterloo County

(no corresponding district)

Wentworth
Created in 1816 from Haldimand, Lincoln and York (West Riding) Counties

Gore 1816-1849

York
Created in 1792

Home 1792-1849