Ernst Julius Theodor Korselt (24 November 1891, Annaberg-Buchholz, Kingdom of Saxony – 25 August 1943) was a German jurist, genealogist, and "homeland researcher" ("Heimatforscher"). The government councillor was sentenced to death for negatively influencing Germany's fighting forces – an offence called Wehrkraftzersetzung in German – after he publicly uttered his opinion that Hitler's resignation was the only way to avoid defeat.