Born July 13, 1887, Wilton Township, Waseca County, Minnesota, Frank T. Gallagher graduated from Waseca High School in 1907. He completed his legal studies at University of Minnesota Law School, graduating in 1913. After completing his studies, Gallagher did not initially practice law, but worked in sales, selling farm equipment and later, insurance. In 1929, he left sales and opened a law practice in Albert Lea, and a few years later joined his brother’s law firm: Gallagher, Madden & Gallagher where he remained for the next 25 years. Gallagher also served as a Member of Board of Education at Waseca for 13 years. In 1946, Gallagher ran for and won a seat on the Minnesota Supreme Court in a contested election against governor-appointed justice, William C. Christianson. He was reelected in November 1952, and November 1958, and authored nearly 600 opinions for the Court. Justice Gallagher retired in 1963, but continued to hear cases in retirement status until 1970. Justice Gallagher died May 21, 1977.
You may read more about the life and work of Justice Gallagher in his obituary, linked below, and in the Minnesota Supreme Court Historical Society's book: Testimony: Remembering Minnesota's Supreme Court Justices, which is the source of this brief biography.