Red Clydeside

Red Clydeside was an era of political radicalism in Glasgow, Scotland, from the 1910s until the early 1930s. It also referred to the area around the city on the banks of the River Clyde, such as Clydebank, Greenock, Dumbarton and Paisley. Red Clydeside is a significant part of the history of the labour movement in Scotland and Britain as a whole.

Some newspapers of the time used the term "Red Clydeside" in a derogatory manner, to refer to the groundswell of popular and political radicalism that had erupted in Scotland. A confluence of charismatic individuals, organised movements, and socio-political forces gave rise to Red Clydeside, which had its roots in working-class opposition to Britain's participation in the First World War. The region had a long history of political radicalism dating back to the Society of the Friends of the People and the "Radical War" of 1820.