Franklin Leander Gilson (October 22, 1846 – June 7, 1892) was an American politician and jurist.

He was the 32nd Speaker of the Wisconsin State Assembly, and for the last two years of his life, he was judge of the Milwaukee Superior Court.

In 1870, he moved to West Bend, Wisconsin, in Washington County, and studied law with his uncle Leander F. Frisby.

In 1883, Gilson moved to Milwaukee, Wisconsin, to practice law with his uncle Leander Frisby.

In 1890, Gilson was appointed judge of Milwaukee Superior Court serving until his death in 1892.