Below is some information about census records before 1841
Pre-1841 Census
There are only a few name lists created on the parish level for the census years 1801, 1811, 1821, 1831. The few surviving pre-1841 censuses generally contain only names of the head-of-household. Consult an archive in your county to determine what may be available or information on pre-1841 census records can be found in:
The University of Essex, Department of History published an easy to follow PDF file in 2004 entitled "Census Schedules and Listings, 1801-1831: An Introduction and Guide" by Richard Wall, Matthew Woollard and Beatrice Moring. This is now available at two websites: (1) The University of Essex, from which it can be readily downloaded; and (2) Academia, from which it can be downloaded by those who first sign up to enroll in Academia. The 151-page guide includes a county-by-county catalogue of the surviving name lists that have been found for the English censuses from 1801-1831, including all those listed in the following work by Chapman.
Chapman, Colin R., Pre-1841 Censuses and Population Listings in the British Isles. Dursley, Gloucestershire, England : Lochin Publishing, 1998 (5th ed). (Family History Library book 942 X27cc, 1998)
The 1831 census was collated by the census office and the resulting Parish Register Abstracts form an important part of the published census material, because from it alone, the clergymen's manuscript returns have survived. The records are held at The National Archives of the UK under 'Clergymen's returns of 1831' (HO71/1-HO71/124.)
There is statistical data available for every parish in the pre-1841 censuses. Consult Online Historical Population Reports article for further details.
The above was from the Family Search website. Link below for further details
https://familysearch.org/wiki/en/England_Census#Pre-1841_Census