| J. D. Barnett | |
| Birth Date: | 2 January 1845 |
| Birth Place: | Buffalo, New York |
| Death Place: | Santa Rosa, California |
| State Assembly: | California |
| District: | 24th |
| Term: | January 5, 1891 - January 2, 1893 |
| Preceded: | James W. Ragsdale |
| Succeeded: | Henry F. Emeric |
| Party: | Republican |
| Spouse: | Mary Cox |
| Children: | 4 |
| Battles: | American Civil War |
Joel Dwight Barnett (January 2, 1845 - December 9, 1897) served in the California State Assembly for the 24th district.[1] In 1864, during the American Civil War, he served in Company A, 44th Wisconsin Volunteer Infantry Regiment of the Union Army.[2]