Lucien B. Caswell

Lucien Bonaparte Caswell (November 27, 1827 – April 26, 1919) was an American politician.

Born in Swanton, Vermont, he moved with his family to frontier Wisconsin in 1836 and settled along the Rock River, just south of Lake Koshkonong. Caswell attended Milton Academy and Beloit College, studying law. He moved to Fort Atkinson, where he opened a law practice in 1851.

Caswell served in the Wisconsin State Assembly and as a draft commissioner during the American Civil War period. He was with Governor Louis P. Harvey on his fatal trip to visit Wisconsin troops in Tennessee.

Caswell served seven terms in the United States House of Representatives as a Republican. He was first elected in the 44th Congress representing Wisconsin's 2nd congressional district and was subsequently elected to the 45th, 46th and 47th Congresses serving from March 4, 1875 to March 3, 1883. He was once again elected to the 49th and subsequent congresses through to the 51st Congress however this time representing Wisconsin's 1st congressional district from March 4, 1885 to March 3, 1891. As a representative, he was active in establishing the Federal appeals court system and overseeing the construction of the Library of Congress.