If you contact the Lancs Record Office in Preston, there are a very few Parishes with the old 1801 - 1831 census still extant, from memory these include Whalley (Clitheroe), Broughton, Eccleston, Prescot/Penketh, Ashton under Lyne & Great Bolton township of Bolto le Moors - and the whole of Liverpool City 1801 in Liverpool Central Library
Many are just headcounts with Household Head named, some have more info. 1841 is really the 1st 'useful' census ...