Sir William Henry Seager (1862 – 10 March 1941)[1] was a Welsh shipping magnate and Liberal Party politician who spent four years as a Member of Parliament (MP).

The Seager family were originally from Ilfracombe, Devon, but moved to Cardiff in the 1850s.

William Henry Seager was born in Cardiff and initially worked as a clerk but established his own business, W. H. Seager & Company, ship's chandlers, at 109, Bute Street, Cardiff in 1892.

In memory of his son Willie who was killed in action in 1916 at the age of 23, he built the William Seager Memorial Homes in Cardiff for retired Merchant Seamen and their wives and an operating theatre in Cardiff Royal Infirmary[4] He lived at Croft-Y-Bwla, near Monmouth and served as High Sheriff of Monmouthshire in 1932.

[5] During the Second World War, all the company's ships except the Campus were lost to enemy action.