Wilhelm Willink (sometimes Willem, Wilheim or Wilhem) (1750 – 1841) was a wealthy Amsterdam merchant, and one of the investors in the Holland Land Company, and the Louisiana Purchase. Wilhelm Willink had a summer estate on the Spaarne River, neighboring the estate villa Welgelegen of his associate Henry Hope.

In the 18th century it became fashionable for Dutch businessmen to invest in the young United States, and many were talked into investing in land there after John Adams signed the trade treaty with the Netherlands in 1782. Around 1790 there were reportedly thirteen investors in the Holland Land Company syndicate, who hoped to profit by buying a large tract of land in Western New York and northern Pennsylvania and reselling it to settlers and businessmen. The other Holland Land Company investors included: the merchants Pieter and Christiaan van Eeghen; Rutger Jan Schimmelpenninck, a lawyer and politician; Pieter Stadnitski; the brothers and bankers Jan, Roelof & Nicolaas van Staphorst; Hendrick Vollenhoven; Cornelius Vollenhoven; Hendrick Seye; Wilhelm Willink (the younger); Jan Willink; and Jan Willink (the younger).