August Vincent Theodore Spies (/spiːs/, SPEES; December 10, 1855 – November 11, 1887) was an American upholsterer, radical labor activist, and newspaper editor. Spies is remembered as one of the anarchists in Chicago who were found guilty of conspiracy to commit murder following a bomb attack on police in an event remembered as the Haymarket affair. Spies was one of four who were executed in the aftermath of this event.