| Thomas Henry Armstrong | |
| Order: | 5th |
| Office: | Lieutenant Governor of Minnesota |
| Term Start: | January 8, 1866 |
| Term End: | January 7, 1870 |
| Governor: | William Rainey Marshall |
| Predecessor: | Charles D. Sherwood |
| Successor: | William H. Yale |
| Order2: | 7th |
| Office2: | Speaker of the Minnesota House of Representatives |
| Term Start2: | 1864? |
| Term End2: | 1865 |
| Predecessor2: | Jared Benson |
| Successor2: | James B. Wakefield |
| Birth Date: | February 6, 1829 |
| Birth Place: | Milan, Ohio |
| Death Place: | Albert Lea, Minnesota |
| Party: | Republican |
| Profession: | banker, lawyer, legislator |
| Spouse: | Elizabeth M. Burgess Butman |
Thomas Henry Armstrong (February 6, 1829 - December 29, 1891) was a Minnesota banker, lawyer, legislator, and the fifth Lieutenant Governor of Minnesota. He became Lieutenant Governor under Governor William Rainey Marshall from January 8, 1866, to January 7, 1870. Armstrong served in the Minnesota Constitutional Convention and both houses of the Minnesota State Legislature. He died in 1891 in Albert Lea, Minnesota.[1] [2]
Thomas Henry Armstrong was born in Milan, Ohio, on February 6, 1829, the son of Augustus Armstrong (1790-1862) and Phebe Higby (1805-1864).
His father was born in Rhode Island but later moved to Milan, Ohio, where he married Phebe Higby. Following this, he settled down and became a farmer.
Thomas studied in Milan, Ohio for a couple of years before moving to Minnesota in 1855, where he settled in High Forest, Minnesota. Before the outbreak of the Civil war, he was originally a Douglas Democrat, but when the war broke out, he became a staunch Republican He stayed in High Forest until he moved to Albert Lea in April 1875.
In the autumn of 1874, he ran as an independent for the State Senate, an endeavor in which he was successful.