James Thomas Fallon (1823 – 26 May 1886) was an Irish-born Australian politician.
He was born at Athlone to farmer James Fallon and Margaret Norton.
He migrated to Sydney in 1841 and operated a general store.
He became a vigneron, being director of a Murray Valley-based company from 1858.
In 1869 he was elected to the New South Wales Legislative Assembly for Hume, but he did not re-contest in 1872.