Lewis Marshall Long (born June 22, 1883) was a Democratic member of the United States House of Representatives from Illinois. He represented Illinois as an at-large member of Congress and served a single term in the U.S. House.
Long took office on January 5, 1937, and served until January 3, 1939. During this period, he held the role of Representative for Illinois at-large, reflecting a statewide constituency rather than a specific numbered district. His service in Congress identifies him as a historical member of the House from Illinois during the late 1930s.
Lewis Marshall Long did not return to Congress after his first term ended in 1939. No additional committee assignments, offices, or contact details are recorded in the available metadata, and there is no indication of further federal legislative service beyond his single term.
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