You asked

Since the 2011 Census, how many people have been fined £1000 for not completing and/or returning a census form.

We said

Thank you for your request for information about non-compliance procedures relating to the 2011 Census.

As a result of non-completion of the 2011 Census form the Crown Prosecution Service took 286 cases to Court. 270 of these cases resulted in guilty convictions. Of these 4 received the maximum fine of £1,000, the amount imposed in other cases varied with the average fine amounting to £217.99.