John Teahan
John Denis Teahan was an Australian politician who served as a Labor Party member of the Legislative Council of Western Australia from 1954 to 1965, representing North-East Province.
Teahan was born in Boulder, Western Australia, to Ellen and Patrick Teahan. He attended Christian Brothers' College, Kalgoorlie, and then moved to Perth to work as a clerk with the Commonwealth Taxation Office. Teahan moved back to Kalgoorlie in 1932, setting up as a storekeeper and taxation consultant. He was elected to the Boulder Municipal Council in 1938, and in 1944 was elected mayor. Teahan contested Labor preselection for the 1948 Boulder by-election, but was defeated by Charlie Oliver. He entered parliament at the 1954 Legislative Council election, defeating Sir Harold Seddon of the Liberal Party. Teahan was re-elected in 1960, but retired at the 1965 state election. He died in Boulder in October 1968, aged 68.