The Macclesfield by-election, 1971 was a parliamentary by-election held on 30 September 1971 for the constituency of Macclesfield in Cheshire. It was caused by the elevation to the peerage of the sitting MP, the Conservative Arthur Vere Harvey. Although this was a fairly safe seat which had been Conservative for over half a century, the party managers were concerned since the Labour party had recently won Bromsgrove with a 10.1 per cent swing and only 9.5 per cent would be required to take Macclesfield.