Thaddeus Stevens (April 4, 1792 – August 11, 1868) was an American Republican leader. He was one of the most powerful members of the United States House of Representatives from 1849 until his death in 1868.

He was chairman of the powerful House Ways and Means Committee. Stevens was a witty, sarcastic speaker and confident party leader. He dominated the House from 1861 until his death. Stevens helped create the 14th Amendment to the United States Constitution. He also helped with the act that helped the Reconstruction of the United States.