James Tobias Ryan (4 January 1818 – 17 October 1899) was an Australian politician.
He was born at South Creek near Penrith to ex-convict printer John Michael Tobin Ryan and Mary Rope.
After a brief education he worked as a timber getter, ploughman, milkman and horsebreaker with his father, and then settled on the Nepean River.
From 1840 he worked as a butcher at Penrith, and he also acquired property on the Macquarie and Castlereagh rivers.
He worked as a land valuator and ran a boarding house until his death at Woolloomooloo in 1899.