Sir Walter Gilbey, 1st Baronet DL (2 May 1831 – 12 November 1914) was an English wine-merchant and philanthropist.
He was born at Bishop's Stortford, Hertfordshire to parents Henry and Elizabeth Gilbey. His father, the owner (and frequently the driver) of the daily coach between Bishop's Stortford and London, died when he was eleven years old, and young Gilbey was shortly afterwards placed in the office of an estate agent at Tring, subsequently obtaining a clerkship in a firm of parliamentary agents in London.
On the outbreak of the Crimean War, Walter Gilbey and his younger brother, Alfred, volunteered for civilian service at the front, and were employed at a convalescent hospital on the Dardanelles. Returning to London on the declaration of peace, Walter and Alfred Gilbey, on the advice of their eldest brother Henry Gilbey who was a wholesale wine-merchant, they started in the retail wine and spirits trade, such as the local London style gin.
The heavy duty then levied by the British government on French, Portuguese and Spanish wines was prohibitive of a sale among the English middle classes, and especially lower middle classes, whose usual alcoholic beverage was accordingly beer. Henry Gilbey was of opinion that these classes would gladly drink wine if they could get it at a moderate price, and by his advice Walter and Alfred determined to push the sales of colonial, and particularly of Cape, wines, on which the duty was comparatively light. Backed by capital obtained through Henry Gilbey, they accordingly opened in 1857 a small retail business in a basement in Oxford Street, London.