Gabriel Bouck (December 16, 1828 – February 21, 1904) was an American lawyer, Democratic politician, and Wisconsin pioneer.

He was born in Fultonham, Schoharie County, New York, the fourth of eight children of William C. Bouck and Catherine Lawyer.

It was with some reluctance that Bouck accepted this assignment when it was offered by Governor Alexander Randall; he was strongly encouraged to do so by fellow Wisconsin officer Edward S. Bragg.

Bouck led the 18th Wisconsin through two years of campaigning in the western theater of the war, serving in the Army of the Tennessee under Ulysses S. Grant and William Tecumseh Sherman.

Following the war, he stayed active in military endeavors, founding two Grand Army of the Republic (G.A.R.)

His greatest political ambition was to be elected Governor of Wisconsin, the same office held by his father in the state of New York.

After four months of being confined to his room at the Athearn Hotel in Oshkosh, he died there on Sunday morning at 2:45 a.m., February 21, 1904.