William Paul (1884–1958) was a British socialist politician. Born in Glasgow, Paul became an active socialist and joined the Socialist Labour Party (SLP) soon after it was founded. In 1911, he moved to Derby, where he ran a market stall selling hosiery and drapery. Moving his stall from city to city, he was able to link SLP members across northern England and the Midlands, and surreptitiously distribute radical literature.