Levi Lincoln Sr., American lawyer and politician, 4th United States Attorney General (died 1820)

Levi Lincoln Sr. was an American revolutionary, lawyer, and statesman from Massachusetts. A Democratic-Republican, he most notably served as Thomas Jefferson's first attorney general, and played a significant role in the events that led to the celebrated Marbury v. Madison court case. He served two terms as the lieutenant governor of Massachusetts, acting as governor for the remainder of Governor James Sullivan's term after his death in December 1808. Lincoln was unsuccessful in his bid to be elected governor in his own right in 1809.

The United States attorney general is the head of the United States Department of Justice and serves as the chief law enforcement officer of the federal government. The attorney general acts as the principal legal advisor to the president of the United States on all legal matters. The attorney general is also a statutory member of the Cabinet of the United States and a member of the United States National Security Council. Additionally, the attorney general is seventh in the presidential line of succession.