William Savin Fulton (June 2, 1795 – August 15, 1844) was an American lawyer and politician who served as a United States Senator from Arkansas from 1836 until his death in 1844.

Fulton was born in Cecil County, Maryland, and graduated from Baltimore College in 1813.

He had intended to study law, but with the outbreak of the War of 1812 he enlisted in a company of volunteers at Fort McHenry.

Fulton was military secretary to General Andrew Jackson during the Seminole War in 1818.

After the war, Fulton moved to Gallatin, Tennessee, where he was admitted to the bar in 1817.