Marshall Arnold ( * October 21, 1845 in Farmington, Missouri, † June 12, 1913 in Benton, Missouri ) was an American politician. Between 1891 and 1895 he represented the State of Missouri in the U.S. House of Representatives.
Marshall Arnold attended the public schools of his home. In the years 1870 and 1871, he taught himself as a teacher at Arcadia College. After that, he was employed by the management of the county and probate court in St. Francois County. After studying law and his 1872 was admitted to the bar he began in commerce to work in this profession. From 1873 to 1876 he was a prosecutor in the local Scott County. At the same time he proposed as a member of the Democratic Party launched a political career.
From 1877 to 1879 Arnold sat as an MP in the House of Representatives from Missouri. In the congressional elections of 1890 he was in the 14th electoral district of his state in the U.S. House of Representatives in Washington DC chosen, where he became the successor of Henry Robert Whitelaw on March 4, 1891. After a re-election he was able to complete in Congress until March 3, 1895 two legislative sessions. In 1894 he was defeated by Republican Norman Adolphus Mozley. After his retirement from the U.S. House of Representatives Arnold practiced law in Benton, where he died on 12 June 1913.