The 1917 Norwich by-election was held on 26 August, 1917. The by-election was held due to the incumbent Labour MP, George Roberts, becoming Minister of Labour.
The Norwich Labour Party and Trades Council repudiated Roberts because he accepted office in the Coalition Government. However, the National Executive of the Labour Party endorsed him, so he stood as an official Labour Party candidate. Due to the wartime electoral truce between the main parties, Roberts was returned unopposed.[1]