William Trumbull (1575?–1635) was an English diplomat, administrator and politician. From 1605 to 1625 Trumbull was secretary and later envoy from James I and then Charles I at the Brussels Court of Archduke Albert of Austria, ruler of the Habsburg Netherlands. Trumbull also had an interest in music. Around 1595 he compiled a personally prepared collection of lute manuscripts that has become known as the Trumbull lute book, which shows he would have had access to the lute music of English court composers spanning much of the reign of Elizabeth I.