Marshall Mason Strong (September 3, 1813 – March 9, 1864) was an American lawyer, newspaper editor, businessman, and politician from Racine, Wisconsin who served on the Wisconsin Territorial Council (the predecessor of the Wisconsin State Senate) of the Wisconsin Territorial Legislature in 1838–1839 and 1844–47 from Racine County, including a term as President of the Council. He later spent a single one-year term in 1849 as a Free Soil Party member of the Wisconsin State Assembly from that county.