Sir James Arndell Youl KCMG (1811–1904) was a Tasmanian colonist from New South Wales.
He was the eldest son of John Youl, and inherited Symmons Plains.
He became a noted pastoralist, best known for introducing brown trout to Australia, and was created a Justice of the Peace in 1837.
Youl moved to England in 1854 with his wife Eliza (née Cox), where he lived in Clapham Park, Surrey.
[1] Youl was a director of the Commercial Banking Company of Sydney for some years.