The 1950 Brighouse and Spenborough by-election was a parliamentary by-election held in the United Kingdom on 4 May 1950 for the House of Commons in the marginal constituency of Brighouse and Spenborough. The seat became vacant on the death of Frederick Arthur Cobb, who has been the local Member of Parliament (MP) for only 3 months, since the general election in February 1950. He had previously been the MP for Elland from 1945.