John Alexander CMG (1876 – 15 July 1941) was a member of the New Zealand Legislative Council from 1934 to 1941 when his term ended.

[4] His wife was a cousin of Nellie Melba (their mothers were sisters), the Australian operatic soprano based in Europe who had an international career.

In October 1926, he joined the Prisons Board[10] and remained a member until shortly before his death.

[3] The director of Kew Gardens, Sir Arthur Hill, was in Auckland in 1932 and they visited a kauri forest owned by Alexander near Cascade Park in the Waitakere Ranges.

In November 1940, he underwent a serious operation and remained in hospital until February 1941 before he returned to his home in Remuera.

[15] The Legislative Council next met on 22 July and the following spoke about Alexander: David Wilson (Leader of the House), Bernard Martin, Jack McCullough, William McIntyre, and James Cotter.