The 1821 Census was carried out on May 28th, 1821 . This is a complete list of all the reports published from the 1821 census, but a shorter listing showing just those reports from which Vision of Britain can present text or statistics is available here.

Great Britain

Report Yr. of Publ. Reference within British Parliamentary Papers
Comparative Statement of Population etc., Gt. Britain, 1801, 1811, 1821 1822 1822 xxi (8) 631
Abstracts of the Answers and Returns: Preliminary Observations 1822 1822 xv (502)
Abstracts of the Answers and Returns: Enumeration Abstract 1822 1822 xv (502)
Abstracts of the Answers and Returns: Parish-Register Abstract 1822 1822 xv (502)

Ireland

Report Yr. of Publ. Reference within British Parliamentary Papers
Abstracts of the Answers and Returns: Enumeration Abstract 1823 1824 XXII (577) 411