Ewald von Kleist may refer to any of the following persons: Ewald Georg von Kleist (–1748), co-inventor of the Leyden jar Ewald Christian von Kleist (1715–1759), German poet and soldier Paul Ludwig Ewald von Kleist (1881–1954), German field marshal Ewald von Kleist-Schmenzin (1890–1945), conspirator in the 20 July plot to assassinate Adolf Hitler Ewald-Heinrich von Kleist-Schmenzin (1922–2013), son of Count Ewald von Kleist-Schmenzin; conspirator in the 20 July plot