Francis William Ogilvie-Grant, 10th Earl of Seafield (9 March 1847 – 3 December 1888), styled Viscount Reidhaven from 1884 to 1888, was a Scottish peer who emigrated to New Zealand.

[1] In 1884 following the death of his cousin, Ian Ogilvie-Grant, 8th Earl of Seafield, the title devolved to the former's uncle (Frank's father).

[5] He was succeeded by his oldest son in the earldom, James Ogilvie-Grant, 11th Earl of Seafield, who at the time was twelve years old.

[2][6] He was fatally wounded in World War I in 1915, and was succeeded in the barony of Strathspey, the baronetcy of Colquhoun and as Chief of Clan Grant by his younger brother Hon.

[6] The earldom and the other subsidiary Scottish peerages could be passed on to female heirs, and were inherited by Nina Ogilvie-Grant, 12th Countess of Seafield.