威廉·格勒纳全名是卡尔·爱德华·威廉·格勒纳 (德语：Karl Eduard Wilhelm Groener 1867年11月22日－1939年5月3日) ，是一位德国将军及政治家，最高军阶为陆军中将。

威廉·格勒纳出生于符腾堡的路德维希堡，父亲是军部主计员。1884年，他加入符腾堡军队，于1893至1897年入读军事学院，后来在1899年升任到德国参谋部。在往后十七年之间，他一直从事铁路部门的工作，并在1912年升任主管。1916年11月，格勒纳转而到普鲁士陆军部 (Prussian Minister of War) 担任副部长并监控军事生产。1917年8月，他到乌克兰指挥作战。

Karl Eduard Wilhelm Groener (22 November 1867 – 3 May 1939) was a German soldier and politician. His organisational and logistical abilities resulted in a successful military career before and during World War I. After a confrontation with the Quartermaster general of the German army and de facto dictator of Germany, Erich Ludendorff, Groener was reassigned to a field command. However, on Ludendorff's dismissal in October 1918, Groener succeeded him as Erster Generalquartiermeister. Groener then worked with the new Social Democratic president Friedrich Ebert to prevent chaos and a left-wing take-over during the German Revolution of 1918–19. Under his command the military bloodily suppressed leftist uprisings throughout Germany. Yet he also tried to integrate the military, which was dominated by an aristocratic and monarchistic officer corps, into the new republic. After resigning from the army in the summer of 1919, Groener served in several governments of the Weimar Republic as minister of transportation, interior and defence. He was pushed out of the government in 1932 by Kurt von Schleicher, who was working on a pact with the Nazis. Groener was an obstacle to the pact.