FamilySearch - England and Wales - Census Records

The Historical Record Collections for the United Kingdom and Ireland include the following free census indexes. There is a link to the commercial site findmypast.co.uk where images of the original records are available for a fee.
• England and Wales Census, 1841
• England and Wales Census, 1851
• England and Wales Census, 1861
• England and Wales Census, 1871 - Currently this collection is 81% complete. Additional records will be added when completed
• England and Wales Census, 1881
• England and Wales Census, 1891
• England and Wales Census, 1901
• England and Wales Census, 1911