James Isaac Mann

James Mann
Member of the Legislative Assembly of Western Australia
In office 12 April 1930 – 25 March 1950
Preceded by	Charles Wansbrough
Succeeded by	None (seat abolished)
Constituency	Beverley
In office 25 March 1950 – 31 March 1962
Preceded by	None (new seat)
Succeeded by	None (seat abolished)
Constituency	Avon Valley
Personal details
Born	(1892-06-22)22 June 1892 Toodyay, Western Australia, Australia
Died	20 June 1965(1965-06-20) (aged 72) Beverley, Western Australia, Australia
Political party	Nationalist (1927) Country (1924; 1930–1949) Liberal (from 1949)
Other political affiliations	Independent (1949)

James Isaac Mann (22 June 1892 – 20 June 1965) was an Australian politician who was a member of the Legislative Assembly of Western Australia from 1930 to 1962.

Mann was born in Toodyay, Western Australia, to Caroline Jane (née Edwards) and John Gibson Mann. He was raised in Beverley, where his father was an early settler and served as the town's mayor for a period. Mann enlisted in the Australian Imperial Force in December 1914, and during the war served with the 10th Light Horse Regiment. After returning to Australia, he took up land at Beverley as part of a soldier settlement scheme. Mann first ran for parliament at the 1924 state election, but was narrowly defeated by Charles Wansbrough in the seat of Beverley, losing by just 15 votes on the two-candidate-preferred count. Both Mann and Wansbrough stood for the Country Party, but owing to a split in party stood for different factions, with Mann representing the Ministerial faction (supporting the government of James Mitchell) and Wansbrough representing the Executive faction (opposing Mitchell's government).

At the 1927 state election, Mann recontested Beverley for the Nationalist Party, but was again defeated by Wansbrough. He had switched back to the Country Party by the 1930 election, and on his third attempt defeated Wansbrough with 55.4 percent of the two-candidate-preferred vote. From 1943 to 1947, Mann was deputy chairman of committees in the Legislative Assembly. He resigned from the Country Party in March 1949, and initially sat as an independent before joining the Liberal Party in May 1949. He was a supporter of a merger between the two parties (in order to provide a more consistent opposition to the Labor Party), and the Liberal Party changed its name to the Liberal and Country League after his defection (although he was the only Country MP to do so). At the 1950 state election, the seat of Beverley was abolished and Mann transferred to the new seat of Avon Valley. He held that seat until his retirement at the 1962 election, consistently winning large majorities (and running unopposed on one occasion, in 1953).

Mann died in Beverley in June 1965, aged 72. He had married Clara Constance Smith in April 1919, with whom he had two sons and two daughters. His father-in-law, Edmund Horace Smith, was also a member of parliament.