Stephen Osander Bennett (1807 – May 24, 1886) was an American merchant, farmer, and Free Soil politician.
He moved in his youth to New Haven, Connecticut, in preparation for college, but his eyesight made that impractical.
He was elected to the Assembly from Racine County for the 1850 session (succeeding James DeNoon Reymert, another Free Soiler), and to the Wisconsin State Senate for 1851 and 1852 sessions, succeeding fellow Free Soiler Victor Willard.
In 1853 he was elected president of the Racine County Agricultural Society.
[5] In 1859, he sold his farm and moved to Kalamazoo, Michigan, where he resumed his prior occupation as a merchant.