| John Henry Ilsley | |
| Office: | Justice of the Louisiana Supreme Court |
| Term Start: | April 3, 1865 |
| Term End: | November 1, 1868 |
| Predecessor: | Albert Voorhies |
| Successor: | William Wirt Howe |
| Birth Date: | 22 June 1806 |
| Birth Place: | London, England |
| Death Place: | Donaldsonville, Louisiana, U.S. |
| Nationality: | American |
| Alma Mater: | University of Oxford |
| Profession: | Judge |
John Henry Ilsley (June 22, 1806 – May 9, 1880) was a justice of the Louisiana Supreme Court from April 3, 1865, to November 1, 1868.
Born in London, Ilsley graduated from the University of Oxford, and emigrated to the United States at the age of 19. He taught school until admitted to the bar. Several of his sons served in the Confederate States Army.[1] [2]
He died in Donaldsonville, Louisiana.[1] [2]