Florence Isabel Bjelke-Petersen (née Gilmour; 11 August 1920 – 20 December 2017) was an Australian politician.

She was a member of the Australian Senate from 1981 to 1993, and was the wife of the longest-serving Premier of Queensland, Sir Joh Bjelke-Petersen.

Her term was due to commence on 1 July 1981, however, on 6 February 1981, Queensland Senator Glen Sheil resigned, creating a casual vacancy.

Bjelke-Petersen crossed the floor 18 times during her career, the 12th-most of any MP between 1950 and 2019 and the second-most by a woman after Kathy Sullivan.

[10][11] Prime Minister Malcolm Turnbull and Queensland Premier Annastacia Palaszczuk offered to hold a state funeral which was accepted by their son John Bjelke-Petersen.