Stephen Clark Foster (December 24, 1799 – October 5, 1872) was a United States representative from Maine.

He was born in Machias, Massachusetts (now in Maine).

He attended the common schools, learned the blacksmith's trade and subsequently became a shipbuilder.

He was elected as a member of the Maine State House of Representatives 1834–1837, elected as a member of the Maine State Senate in 1840, and serving as its president, and again elected to the Maine House of Representatives in 1847.

He was a member of the Peace Convention of 1861 held in Washington, D.C., in an effort to devise means to prevent the impending US Civil War.