Isaac D. Barnard | |
|---|---|
 | |
| United States Senator from Pennsylvania | |
| In office March 4, 1827 – December 6, 1831 | |
| Preceded by | William Findlay |
| Succeeded by | George M. Dallas |
| Member of the Pennsylvania Senate from the 4th district | |
| In office 1820–1826 | |
| Preceded by | Edward Coleman |
| Succeeded by | Joshua Hunt |
| Personal details | |
| Born | Isaac Dutton Barnard July 18, 1791 Aston Township, Pennsylvania |
| Died | February 28, 1834 (aged 42) West Chester, Pennsylvania |
| Resting place | Oaklands Cemetery |
| Nationality | American |
| Profession | Lawyer |
| Committees | Committee on Militia |
| Military service | |
| Allegiance |  United States |
| Branch/service |  United States ArmyMilitia |
| Rank |  Major general |
| Unit | Fourteenth Regiment, United States Infantry |
| Battles/wars | War of 1812 |
Isaac Dutton Barnard (July 18, 1791 – February 28, 1834) was an American militia leader, lawyer, and politician who served as a United States Senator for Pennsylvania from 1827 to 1831. He served as a Major in the U.S. Army during the War of 1812 and as a Pennsylvania State Senator for the 4th district from 1820 until 1826.