Nomis lists all the data from the 2001 Census, split up by topic, large to very small areas and specialist data.
Data you can get, includes:
summary figures of the main statistics (England and Wales)
datasets on only one census topic
datasets on two or more census topics
datasets on one or more census topics based on 100 persons and 40 households, known as census area statistics
View and download data from the 2001 Census on the Nomis website.