The Newport by-election, 1956 was a parliamentary by-election held on 6 July 1956 for the British House of Commons constituency of Newport in Monmouthshire. The seat had become vacant when the constituency's Labour Member of Parliament (MP), Peter Freeman had died on 19 May 1956, aged 67. He had held the seat since the 1945 general election, having previously been MP for Brecon and Radnorshire from 1929 to 1931.