The 1941 Hornsey by-election was held on 28 May 1941. The by-election was held due to the death of the incumbent Conservative MP, Euan Wallace. It was won by the Conservative candidate David Gammans.

Noel Pemberton Billing, sometimes known as Noel Pemberton-Billing, was a British aviator, inventor, publisher and Member of Parliament for Hertford. He founded the firm that became Supermarine and pro