Alexander Ramsey (September 8, 1815-April 22, 1903) was an American politician. He was born near Harrisburg, Pennsylvania.

Ramsey was elected from Pennsylvania as a Whig to the U.S. House of Representatives and served in the House from March 4, 1843 to March 3, 1847. He served as the first Territorial Governor of Minnesota June 1,1849 to May 15,1853 as a member of the Whig Party.

In 1855, he became the mayor of St. Paul, Minnesota. Ramsey was elected the second Governor of Minnesota after statehood and served from January 2, 1860 to July 10, 1863, but resigned the governorship to become a U.S. Senator, having been elected to that post in 1863 as a Republican. He was re-elected in 1869 and served until March 3, 1875.

Ramsey served as Secretary of War from 1879 to 1881, under President Rutherford B. Hayes.

|- style="text-align: center;" | width="30%" |Preceded by:
See Iowa Territory | width="40%" style="text-align: center;" |Governor of Minnesota Territory
1849 – 1853 | width="30%" |Succeeded by:
Willis Arnold Gorman

|- style="text-align: center;" | width="30%" |Preceded by:
Henry Hastings Sibley | width="40%" style="text-align: center;" |Governor of Minnesota
1860 – 1863 | width="30%" |Succeeded by:
Henry Adoniram Swift

|- style="text-align: center;" | width="30%" |Preceded by:
Henry Rice | width="40%" style="text-align: center;" |U.S. Senator from Minnesota
1863 – 1875 | width="30%" |Succeeded by:
Samuel J. R. McMillan