Thomas B. Miller was born in Plymouth, Pennsylvania. He attended the law school of Dickinson College in Carlisle, Pennsylvania. He was a member of the Sigma Alpha Epsilon fraternity. During the First World War, Miller served as a second lieutenant in the Sixteenth Field Artillery from February 25, 1918, until his discharge as a first lieutenant on September 23, 1919.

On January 23, 1942, Miller was chosen by the Luzerne County Republican Committee as their nominee to fill the vacancy in the Seventy-seventh Congress caused by the resignation of United States Representative J. Harold Flannery.^[1] Miller's Democratic opponent was Daniel J. Flood, and in the May 1942 special election, Miller prevailed, serving in the remainder of Flannery's term. Miller was reelected to the Seventy-eighth Congress, but was an unsuccessful candidate for reelection in 1944.

After leaving Congress, Miller resumed the practice of law in Pennsylvania and in Washington, D.C., in addition to becoming active in banking. He died in died on March 20, 1976, in Wilkes-Barre on March 20, 1976. Miller was cremated and his ashes were scattered at his summer home in Orangeville.

• United States Congress. "Thomas B. Miller (id: M000756)". Biographical Directory of the United States Congress. Retrieved on January 28, 2008
• "The Political Graveyard". Retrieved March 28, 2010.

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