Frank Bosworth Brandegee (July 8, 1864 – October 14, 1924) was a United States representative and senator from Connecticut.

[5] Brandegee was elected as a Republican to the Fifty-seventh Congress to fill the vacancy caused by the death of Charles A. Russell.

[7][8][9] Brandegee resigned from the House to accept election to the U.S. Senate, filling the vacancy caused by the death of Orville H.

[11] A staunch "Old Guard" conservative, Brandegee opposed women's suffrage and America's participation in the League of Nations.

[19] He killed himself in Washington, D.C. on October 14, 1924, inhaling fumes from a gas light in a seldom used bathroom on the third floor of his home.