Georg Klindworth, born Johann Georg Heinrich Klindworth on 16 April 1798 in Göttingen, Germany, was a nineteenth-century German diplomat and intelligence agent employed by several European leaders and princes. He was a political exile from the 1848 upheavals, who had worked as a theater agent for two years, later as a lawyer and also as a statesman. He was for many times described as one of the most influential secret diplomats of his time, from the Congress of Vienna to the time of Bismarck.
Klindworth's "illegitimate" daughter Agnes Street-Klindworth (1825–1906) was a lover of the musician Franz Liszt with whom she had a vast letter correspondence. In political literature, Georg Klindworth is characterized as "an important political secret agent of international reputation" and also as "a man of extraordinary ability, enterprise, amorality and ubiquity". Georg Klindworth died in a suburb of Paris in January 1882.
Klindworth was the third child of court mechanic and watchmaker Johann Andreas Klindworth and Friederike Diederichs, brother of Karl Friedrich Felix Klindworth, a clockmaker and Carl August Klindworth, mechanic and entrepreneur. When Georg was sixteen years old he graduated eighth in his class at the University of Göttingen, where from 1816 he studied philology, receiving his doctorate in 1817. From 1819 Klindworth worked in Berlin as tutor and private secretary to the Portuguese Ambassador Count Oriolo. From 10 December 1821 he was admitted to the Prussian service.