John Henry Garstin CSI (1838 – 15 April 1903) was a British civil servant and administrator who acted as the Governor of Madras from 1 December 1890 to 23 January 1891.
[2] Garstin began his career as the Private Secretary to Francis Napier, 10th Lord Napier, then Governor of Madras and served from 27 March 1866 to 25 January 1870, when he was appointed to the Board of Revenue.
When the tenure of Lord Connemara came to an end, Garstin acted as the Governor of Madras for a short period till the appointment of Beilby Lawley, 3rd Baron Wenlock.
[2] In 1871, Garstin married Isabella Mary MacDonnell, daughter of General George Gordon MacDonell.
They had five sons, Henry, John, Herbert, Charles and Arthur and one daughter, Marion.