Nathan Lynn Bachman (August 2, 1878 – April 23, 1937) was a United States Senator from Tennessee from 1933 until his death.

His father was Dr. Jonathan W. Bachman, Confederate veteran and former pastor of First Presbyterian Church in Chattanooga.

In 1918 he became an associate justice of the Tennessee Supreme Court, resigning in 1924 to run for the U.S. Senate.

However, on February 28, 1933, Bachman was appointed to the United States Senate by governor of Tennessee Hill McAlister to the unexpired term of Senator Cordell Hull, who had resigned to accept the appointment of President Franklin D. Roosevelt to the office of Secretary of State.

Bachman was a prominent leader in the Masonic fraternity in Chattanooga, including the Knights Templar Commandery # 14.