Robert Cosgrove, Australian politician, 30th Premier of Tasmania (born 1884)

Sir Robert Cosgrove was an Australian politician who was the 30th and longest-serving Premier of Tasmania. He held office for over 18 years, serving from 1939 to 1947 and from 1948 to 1958. His involvement in state politics spanned five decades, and he dominated the Tasmanian branch of the Australian Labor Party for a generation.

The premier of Tasmania is the head of the executive government in the Australian state of Tasmania. By convention, the leader of the party or political grouping which has majority support in the House of Assembly is invited by the governor of Tasmania to be premier and principal adviser.