Samuel Nicholas Duncan was an American politician and a member of the Democratic Party. He served as a U.S. Representative for the state of North Carolina from 1873 to 1875. Duncan was known for his involvement in local and state politics during the post-Civil War era, a time of significant change in the Southern United States. Duncan was born in 1834 and had a background in law. He played a role in the Reconstruction period, which aimed to rebuild the South and integrate formerly enslaved people into society. His contributions to politics during this time reflect the complexities of American history.