The Swing Riots were a widespread uprising in 1830 by agricultural workers in southern and eastern England in protest of agricultural mechanisation and harsh working conditions. The riots began with the destruction of threshing machines in the Elham Valley area of East Kent in the summer of 1830 and by early December had spread through the whole of southern England and East Anglia. It was to be the largest movement of social unrest in 19th-century England.

A threshing machine or a thresher is a piece of farm equipment that separates grain seed from the stalks and husks. It does so by beating the plant to make the seeds fall out. Before such machines were developed, threshing was done by hand with flails: such hand threshing was very laborious and time-consuming, taking about one-quarter of agricultural labour by the 18th century. Mechanization of this process removed a substantial amount of drudgery from farm labour. The first threshing machine was invented circa 1786 by the Scottish engineer Andrew Meikle, and the subsequent adoption of such machines was one of the earlier examples of the mechanization of agriculture. During the 19th century, threshers and mechanical reapers and reaper-binders gradually became widespread and made grain production much less laborious.