| Louis Jefferson Brann | |
| Order1: | 56th |
| Office1: | Governor of Maine |
| Term Start1: | January 4, 1933 |
| Term End1: | January 6, 1937 |
| Predecessor1: | William T. Gardiner |
| Successor1: | Lewis O. Barrows |
| Office2: | Mayor of Lewiston, Maine |
| Term2: | 1922-1924 |
| Predecessor2: | William H. Newell |
| Successor2: | Robert J. Wiseman |
| Term3: | 1915-1916 |
| Predecessor3: | Robert J. Wiseman |
| Successor3: | Charles P. Lemaire |
| Office4: | Register of Probate for Androscoggin County, Maine |
| Term Start4: | 1909 |
| Term End4: | 1913 |
| Predecessor4: | Fred O. Watson |
| Successor4: | James W. Murray |
| Birth Date: | 6 July 1876 |
| Birth Place: | Madison, Maine, U.S. |
| Death Place: | Falmouth, Maine, U.S. |
| Party: | Democratic |
| Profession: | Attorney |
| Alma Mater: | University of Maine |
Louis Jefferson Brann (July 6, 1876 – February 3, 1948) was an American lawyer and political figure. He was the 56th Governor of Maine.
Brann was born in Madison, Maine to Charles M. Brann and Nancy Lancaster Brann. He attended schools in Gardiner, Maine. He graduated from the University of Maine in 1898, after which he studied law. He was admitted to the bar in 1902 and began a practice in Lewiston. In the late 1920s he formed Brann & Isaacson with Peter A. Isaacson, a law firm which is still in existence (2010).
On March 8, 1902, Brann married Martha "Mattie" Cobb. They were the parents of four children—Donald L., Marjorie, Dorothy L., and Nancy E.
Brann participated widely in local and state government: he was the Androscoggin County Register of Probate (1909-1913); a municipal judge (1913-1915); mayor of Lewiston (1915-1917 and 1922–1925); member of the Maine House of Representatives (1919-1920); and delegate to the Democratic National Convention from Maine (1924, 1936, 1940 and 1944). He also served a term as chairman of the Maine Democratic Party.
Brann ran successfully for Governor of Maine in 1932, and was also successful in his re-election bid in 1934. During his administration, a constitutional amendment was sanctioned that secured two million dollars in state bonds for emergency relief during the Great Depression. As part of an initiative to promote Maine tourism and economic development, Brann entertained many celebrities at Blaine House; the "Maine Summer Visitors Day" program he started brought notables to Maine including Boston Braves President Emil Fuchs, authors Gladys Hasty Carroll, Kenneth Roberts and Ben Ames Williams, and singer Rudy Vallee.
Brann ran unsuccessfully for the United States Senate in 1936. He also ran unsuccessfully for governor in 1938. Brann ran unsuccessfully for the other Maine Senate seat in 1940. In 1942, he was also an unsuccessful candidate for Maine's 1st District seat in the United States House of Representatives.
Brann was a member of the Church of Christ, Scientist, and held membership in Beta Theta Pi, and the Knights of Pythias, Elks, National Grange, and Lions Club.
Brann died in Lewiston on February 3, 1948. He was buried at Riverside Cemetery in Lewiston.
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