Wilson was the son of Henry Wilson, a stockbroker, and his wife Ada Alexandrina, and was educated at St Michael's School, Westgate, and St Paul's School, London. Wilson married Winifred May, daughter of Charles Smith, of Sydney, Australia, in 1909. They lived at the Manor House at Waltham St Lawrence in Berkshire. They had three children, two sons and a daughter:
Peter Leslie Orme, born 4 June 1910 in London, farmer and grazier, died 6 July 1980 aged 70 years in Queensland and buried in Caloundra cemetery
David Orme, who was killed on 30 November 1941 in North Africa during the Second World War
Marjorie Orme
On his retirement as Governor of Queensland, Wilson and his wife Winifred returned to live in Surrey, England. However, they visited Queensland on a number of occasions, including the marriage of their son Peter. Wilson died after being hit by a truck while walking in September 1955, aged 79.
In 1932 Wilson was made Governor of Queensland, a post he held until 1946, one of the longest gubernatorial tenures in British history. On 13 May 1937, Wilson planted a small bunya tree on North Quay, Brisbane to mark the name change of the River Road to Coronation Drive to commemorate the coronation of King George VI. From 1932 to 1942, Wilson was the Chief Scout of The Boy Scouts Association'sQueensland Branch, resigning in 1942 when he disagreed with the decision to make the Chief Commissioner of the Scouts a paid position. Leslie Wilson retired at the end of his service as Governor of Queensland.
Freemasonry
Wilson was a freemason. He was initiated into the craft in the Lodge Ionic No. 65, in Sydney, while serving as an aide-de-camp to Harry Rawson. When he returned to England, in 1909, he became a member of Navy Lodge No. 2612. He became Senior Warden of the Lodge in 1913 and Worshipful Master in 1917. He was the Primus Master of Old Pauline Lodge No.3969 consecrated on Friday 18 July 1919. In 1922 he was appointed Junior Grand Warden of the United Grand Lodge of England and District Grand Master of Bombay in the following year. To this day there is a Lodge in Pune, Leslie Wilson Lodge No.4880 E.C., named for him. When he was appointed Governor of Queensland, he became Grand Master of Queensland's Grand Lodge serving for 12 years. After arriving in Brisbane aboard the R.M.S. Otranto on Monday, 13 June 1932, Sir Leslie Orme Wilson proceeded to the Queensland Parliament House, where he was sworn in as the 15th Governor of Queensland and representative of His Majesty King George V. At the Regular Meeting of the Lamington Lodge, No. 110 U.G.L.Q., held on Thursday, 6 July 1933, a motion was passed that R.W. Bro. Wilson P.D.G.M., P.G.D. be accepted as a joining Brother to the Lamington Lodge. The Master read a letter from the United Grand Lodge of Queensland, dated Wednesday, 14 June, covering a special dispensation to ballot at the same meeting. After the ballot, the Master declared that R.W. Bro. Wilson was duly elected a member of the Lamington Lodge. The following year, on Wednesday, 25 July 1934, R.W. Bro. Wilson was invested and installed as the Grand Master of the United Grand Lodge of Queensland. He was proclaimed as the Grand Master for the last time, on Wednesday, 24 July 1945, marking his entry upon his twelfth year as the Grand Master.