Lyndon Ambrose Smith (July 15, 1854 – March 5, 1918) was an American educator, lawyer and Republican politician who served as the 14th Attorney General and the 15th Lieutenant Governor of Minnesota.

His father Ambrose Smith was a clergyman and congregational pastor; his mother Cynthia Egerton was a descendant of Mayflower passenger and Plymouth colony governor William Bradford.

[1] Smith's political career began in 1889 when he was elected attorney for Chippewa County, Minnesota.

He served only one term but was later elected Lieutenant Governor under Republican John Lind in 1899 and re-elected under his successor Samuel Van Sant in 1901.

Smith later ran for the office of Attorney General as a Republican, winning his first term in 1912 and re-election in 1914 and 1916.