Frank Keen Nieass (25 October 1886 – 28 August 1967) was an Australian politician. He was a Labor member of the South Australian House of Assembly, representing East Torrens from 1930 to 1933 and Norwood from 1938 to 1941 and from 1944 to 1947.[1] He was a long-serving secretary of the Australian Government Workers Association.[2]