Sir Paul Meernaa Caedwalla Hasluck (1 April 1905 – 9 January 1993) was an Australian statesman who served as the 17th governor-general of Australia, in office from 1969 to 1974. Prior to that, he was a Liberal Party politician, holding ministerial office continuously from 1951 to 1969.

Hasluck was born in Fremantle, Western Australia, and attended Perth Modern School and the University of Western Australia. After graduation he joined the university as a faculty member, eventually becoming a reader in history. Hasluck joined the Department of External Affairs during World War II, and served as Australia's first Permanent Representative to the United Nations from 1946 to 1947. He would later contribute two volumes to Australia in the War of 1939–1945, the official history of Australia's involvement in the war.

In 1949, Hasluck was elected to federal parliament for the Liberal Party, winning the Division of Curtin. In 1951, less than two years after entering politics, he was made Minister for Territories in the Menzies government. In his twelve years in the position, he initiated transitions toward self-government in Australia's territories, including Nauru, Papua New Guinea, and the Northern Territory.

Following the re-election of the Menzies in 1963, Hasluck was appointed Minister for Defence. In April 1964 he was appointed Minister for External Affairs. His tenure in those positions covered Australia's involvement in the Indonesia–Malaysia confrontation and the first years of the Vietnam War.

After the disappearance of Harold Holt, Hasluck unsuccessfully stood in the resulting Liberal leadership election. He initially stayed on in cabinet under the new prime minister, John Gorton, but in 1969 Gorton instead nominated him to replace Lord Casey as governor-general. In his five years in the position, Hasluck saw two previous political adversaries (William McMahon and Gough Whitlam) become prime minister; he maintained good working relationships with both. In retirement, he was a prolific author, publishing an autobiography, several volumes of poetry, and multiple works on Australian history.

Paul Meernaa Caedwalla Hasluck was born on 1 April 1905 in Fremantle, Western Australia, one of five children born to Patience Eliza (née Wooler) and E'thel Meernaa Caedwalla Hasluck. His father was born in England and arrived in Australia in 1876 as a small child. He obtained a position in the colonial postal service and was postmaster in Coolgardie and on the Great Southern Railway, but later resigned to work full-time for the Salvation Army. His mother was born in England and came to Western Australia to work as a domestic servant, also becoming a devout Salvationist, where she met her future husband.

Hasluck grew up in relative poverty, with the family often in financial distress as his parents undertook full-time missionary work. He had a "strict religious upbringing" in line with the beliefs and tenets of the Salvation Army, but became estranged from the movement at a young age. As a small child Hasluck spent periods in North Fremantle and in locations around regional Western Australia, including York, Kalgoorlie and Collie. The family lived in Collie for four years, where Hasluck's father ran a boys' home for child migrants, before moving back to Perth in 1916 where he ran the Aged Men's Retreat at Guildford.

After a brief period at the Guildford State School, Hasluck won a scholarship to Perth Modern School, which he attended between 1918 and 1922. He was president of the school debating society but later recalled that he lacked in confidence and did not consider going on to further studies. He eventually enrolled in the University of Western Australia (UWA) six years after leaving school, completing a diploma in journalism on a part-time basis in 1932 and graduating Bachelor of Arts in 1937.