Ernst Trygger, (born 27 October 1857 - 23 September 1943) was a Swedish jurist professor and conservative politician. He was the Prime Minister of Sweden from 1923 to 1924 He was also the Swedish foreign minister from 1928 to 1930 in the cabinet of Arvid Lindman. He was a member of the first chamber of the Swedish parliament from 1898 to 1937. He was also leader of the conservatives in that chamber from 1913 to 1933.