Theodore Sedgwick (December 9, 1780 - November 7, 1839) was an American attorney, writer, and Democratic Party politician.

[1] He received his Bachelor of Arts degree from Yale College in 1798,[2] studied law with his father, and was admitted to the bar in 1801.

[4][5] As a legislator, Sedgwick successfully advocated for a charter allowing creation of the Boston and Albany Railroad, and construction commenced shortly after the end of his term in the state House.

[6] Sedgwick was his party's nominee for the United States House of Representatives (1834, 1836) and Lieutenant Governor of Massachusetts (1839).

[1] Sedgwick suffered a stroke on November 7, 1839, while addressing a Democratic Party meeting in Stockbridge.