| Office: | President pro tempore of the North Dakota Senate |
| Term Start: | January 8, 1895 |
| Term End: | January 5, 1897 |
| Predecessor: | John H. Worst |
| Successor: | Clarence B. Little |
| State Senate2: | North Dakota |
| District2: | 9th |
| Term Start2: | November 19, 1889 |
| Term End2: | January 17, 1898 |
| Preceded2: | None (office established) |
| Succeeded2: | Joseph E. Cronan |
| Birth Name: | John Eldridge Haggart |
| Birth Date: | 19 April 1846 |
| Birth Place: | Morristown, New York, U.S. |
| Death Place: | Fargo, North Dakota, U.S. |
| Party: | Republican |
John Eldridge Haggart (April 19, 1846 – September 20, 1905) was an American politician who served as a member of the North Dakota Senate from North Dakota's admission in 1889 to his appointment as United States Marshal for the state in 1898.[1]