Sir Alexander Leith, 1st Baronet

Sir Alexander Leith, 1st Baronet MC (24 September 1869 – 9 November 1956) was a British benefactor.

Leith was the son of Walter Leith, of Ashby de la Zouch, Leicestershire, and Walmer Court, Kent and was educated at Harrow and Brasenose College, Oxford. He served in World War I and was awarded the Military Cross. In 1919 he was created a Baronet.

Leith was High Sheriff of Northumberland in 1923 and later a Deputy Lieutenant of that county. He presented the Gosforth Cup to Newcastle Racecourse in 1951. His seat was at Greycourt, near Riding Hall, Hexham.

Leith died in November 1956, aged 87, when the baronetcy became extinct.