Sir William Jardine, 7th Baronet of Applegarth FRS FRSE FLS FSA (23 February 1800 – 21 November 1874) was a Scottish naturalist.

[6] From 1817 to 1821 he lodged with Rev Dr Andrew Grant at James Square, an arrangement made by his father.

[7] In his early years, aged only 25, he was elected a fellow of the Royal Society of Edinburgh his proposer being Sir David Brewster.

[12] Jardine made natural history available to all levels of Victorian society by editing the hugely popular forty volumes of The Naturalist's Library (1833–1843) issued and published by his brother in law, the Edinburgh printer and engraver, William Home Lizars.

Jardine described of a number of bird species, alone or in conjunction with his friend Prideaux John Selby.

Jardine edited the series of books that were published a part of The Naturalist's Library, and include (in the order in which they were published):[17] Later supplements include the following titles: The Natural History of Man, Humming Birds Volume 3 and a single volume that collated the memoirs of "great naturalists".