Ironbark Creek - Run belonging to Messrs Spencer at Liverpool Plains
Iron Stone Knob - Yarramalong. In 1913 Robert Woolley could point out a stringy bark tree on or near a hillock locally known as the Iron stone Knob, with Sir Thomas Livingstone Mitchells inscription still thereon.
Irrawang - Estate of James King. Aboriginal meaning where the water runs
Irrawang Cottage - Raymond Terrace. School in 1855
Isis River - Co. Brisbane - Stream rising in the Liverpool Range near Downey's Pass and flowing into the Page River near Gundy Gundy. Geographical Encyclopaedia of NSW 1893