William Hogan (1805 - July 30, 1870) was a surveyor, mining engineer, and draftsman active in Tasmania, Australia, in the second half of the 19th century. In 1856, Hogan received a land grand of 'one acre and 25 parcels' in the 'Township of Welsh'. Welsh was apparently a township planned in the vicinity of Gardeners Bay Inlet that never materialized. Little else is known of this elusive figure. He appears on government payrolls on and off in the mid-19th century, but not consistently. In 1858 he was contracted to compile the Sprent/Calder surveys into the first large-scale trigonometrical map of Tasmania.