Henry (Harry) James Marks (1871–1939) was an architect in Toowoomba, Queensland, Australia.
Harry Marks was considered a creative designer and was responsible for many buildings on the Darling Downs as well as two Roman Catholic Churches in Brisbane.
During his career he invented and patented numerous ventilators, reversible casement windows and a method of stucco construction.
He continued the practice into the 20th century and his son Charles Beresford Marks became a partner in 1925.
[1] On 1 March 1939 while walking home for lunch, Harry Marks collapsed and died at the corner of Ruthven and Margaret Streets in Toowooomba.