Franz Sebastian Seiler (1810 – 4 December 1890) was a German, an associate of Wilhelm Weitling, a Swiss reformer. He was a journalist on the Rheinische Zeitung and a member of the in 1846. Seiler was "a stenographer to the French National Assembly in 1848 and 1849." He joined the Communist League and took part in the 1848-1849 revolution in Germany. Following the suppression of that revolution, Seiler escaped to London, England in the 1850s. From 1859-1860 he was the editor of the Deutsche Zeitung, and he started a weekly paper in 1860, The New Orleans Journal. Seiler later worked for Negro suffrage.