Leif Erickson (July 29, 1906 – December 22, 1998) was an American attorney who served as an Associate Justice of the Montana Supreme Court from 1939 to 1945.

[2] Erickson was Richland County District Attorney from 1936 to 1938 and was an Associate Justice of the Montana Supreme Court from 1939 to 1945.

In 1944, he ran for Governor of Montana, winning the Democratic primary and advancing to the general election, where he opposed Republican incumbent Gov.

Ford defeated Erickson by a wide margin to win his second term as governor.

He ran for governor once more in 1948, but finished third in the Democratic primary behind former Montana Attorney General John W. Bonner and Arthur Lamey.