| Duncan McGregor | |
| Birth Date: | 12 August 1836 |
| Birth Place: | Perthshire, Scotland |
| Death Place: | Italy, Wisconsin |
| Occupation: | Educator, politician |
| Party: | Republican |
| Office: | Member of the Wisconsin State Assembly |
| Term Start: | 1904 |
| Term End: | 1908 |
Duncan McGregor (August 12, 1836 - May 30, 1921) was an American politician and educator.
Born in Perthshire, Scotland, McGregor emigrated with his father's family to the United States in 1856 and settled in Wisconsin.[1] He had gone to Perth Academy and University of Aberdeen in Scotland and Lawrence University in Appleton, Wisconsin.[1] McGregor farmed and was a teacher and principal of the Waupaca, Wisconsin High School. McGregor served in the 42nd Wisconsin Volunteer Infantry Regiment during the American Civil War and was commissioned captain.[1] McGregor was the mathematics professor of Platteville Normal School in Platteville, Wisconsin.[1] He also served as the institute conductor and president of the Platteville Normal School.[2] In 1905 and 1907, McGregor served in the Wisconsin State Assembly and was a Republican. He also served as private secretary to Wisconsin Governor Francis E. McGovern.[3] McGregor died at his home in Platteville, Wisconsin, May 30, 1921.[1] [2] [4]