James Ogilvie-Grant, 11th Earl of Seafield, DL (18 April 1876 – 12 November 1915), briefly known as Viscount Reidhaven in 1888, was a Scottish nobleman. Seafield was born in 1876 in Oamaru, New Zealand. He was the eldest child of Francis William Ogilvy-Grant, 10th Earl of Seafield, and Ann Nina, daughter of Major George Thomas Evans, of County Limerick and of Clooneavin, New Zealand. He had six siblings; four sisters and two brothers. His youngest brother was Trevor Ogilvie-Grant (1879–1948). His youngest sister, Nina Geraldine (1884–1951), married Sir Lees Knowles, 1st Baronet in 1915.