William Tulloch Jeans (1848–1907) was a British parliamentary journalist and author.
Jeans was parliamentary correspondent for The Globe, and was widely known for and consulted on his knowledge of parliamentary principle.
In their 1887 review of the first volume of The Lives of Electricians, The Spectator commented that, "Jeans has treated a subject always interesting in a pleasing and graceful way".
His wife came from . They lived in Brighton, then Tulse Hill and Clapham Park in London.
He was the father of Sir James Hopwood Jeans OM FRS (1877–1946), physicist, astronomer and mathematician.