Complete Province of Ontario - Upper Canada - Canada West

The 1871 Ontario Census Index of head of household is at ◊◊◊www.archives.ca/02/020108_e.html.
 The 1871 Ontario index of household heads is also available at the Queen's University web site at ◊◊◊130.15.161.100/census. 1874 Map of Ontario at www.archives.ca/02/02010804_e.html.

Comprehensive Ontario - Many Counties & Many Years

The Ontario GenWeb's official census project is at
◊◊http://users.rootsweb.com/~ongenpro/census

OGSPI Ontario Genealogical Society Provincial Index includes census data at www.ogs.on.ca/ogspi

Durham County

Head-of-household index of the 1803-1851 Hope Township census returns are at ◊www.nhb.com/hunter/census.htm
1803    1804    1805    1806    1807    1809    1810    1811    1812    1813    1814    1815
1816    1817    1818    1819    1820    1821    1822    1823    1824    1825    1826    1827
1828    1830    1831    1832    1833    1834    1835    1836    1837    1838    1839    1840
1841    1848    1850    1851 & 1861 Port Hope & 1861 Hope Township
Hope Township assessment returns 1842    1843    1844    1845    1846    1847

Elgin County

Branch Ontario Genealogical Society has online publications at http://www.elginogs.ca/onlinepubs. 
Included is the 1842 Census Index Malahide Township, Elgin County Canada West / Ontario

Essex and Kent County

Transcripts are at  ◊http://freepages.genealogy.rootsweb.com/~essexandkentcountytranscripts
Included are 1901 Kent County, Camden, Zone, & Leamington townships,
1891 Essex County Gosfield South & Leamington village and 1851 Essex County Colchester

Haldimand & Monck

There are 1901 Sherbrooke and Moulton census indexes at ◊http://search.freefind.com/find.html?id=29395&m=0&p=0

Halton County

Halton's Historical and Newspaper Records are at ◊www.hhpl.on.ca/localhistory/forms.htm

Hastings County

The Bay of Quinte GenWeb has 1851 census indexes at ◊www.rootsweb.com/~onhastin/1851ab.htm

Inhabitants of Adolphustown Ontario from 1794-1822 are at ◊www.qschooner.com/adolphustown/assesslist.html

Lennox & Addington County

1851 Census Fredericksburgh Township is at ◊www.sfredheritage.on.ca/1851Census.html

Huron County

McKillop Township 1851, 1861, & 1871 census  http://freepages.genealogy.rootsweb.com/~irish/census.htm

Oxford County

Oxford County Library Databases & Indexes are at ◊www.ocl.net/genealogy. It includes the Town of Ingersoll censuses for 1851, 1861, 1871, 1891, 1901.

Perth & Waterloo County

Waterloo Region Branch of the Ontario Genealogical Society census data is at ◊www.waterlooogs.ca/census.htm. It includes;
    Waterloo County 1840 Wilmot Township, 1851 Galt, 1851 Waterloo Township
    Perth County Wallace Township 1861 & 1871

Simcoe County

An 1837 Census of Barrie is at www.waynecook.com/1837.html

Wellington Co.

Erin Township, pre-1851, 1861 & 1901 census records are at  ◊www.rootsweb.com/~oncerin 

Lambton, Lanark, Middlesex, Carleton Counties

Census transcriptions at ◊freepages.genealogy.rootsweb.com/~granny2 include the following;

• CARLETON COUNTY 1820-1822 censuses for Townships MARCH GOULBOURN HUNTLEY MARLBOROUGH NEPEAN

• MIDDLESEX COUNTY 1851 census for Townships ADELAIDE  CARADOC  DELAWARE  EKFRID  LOBO  LONDON  METCALFE  MOSA  N.DORCHESTER WEST NISSOURI WESTMINSTER  WILLIAMS 

• Lambton & Lanark County census records shown in the following table