Gregor Straßer (English: Strasser) (31 May 1892 – 30 June 1934) was a German politician. An early member of NSDAP he participated in the Munich Putsch and was later an important figure in the growth of the NSDAP, especially in northern Germany.
Gregor was the brother of Otto Straßer. The brothers supported relatively more socialist views within the NSDAP, such as the nationalization of the economy, causing conflicts with others, including Adolf Hitler, who were in turn moving away from economic socialism. In 1932, there was an attempt by the Chancellor (Dec 1932-Jan 1933) Kurt von Schleicher to split the NSDAP, with Straßer's help. This failed and in March 1933, Strasser officially exited politics by renouncing his Reichstag seat. The following year he was arrested and executed during the Night of the Long Knives.