Allan Nicoll MacDonald (25 August 1892 – 18 January 1978) was an Australian politician who served as a Senator for Western Australia from 1935 to 1947.

[1] He migrated to Western Australia in 1911 and worked at Collie in a bakery before moving to Perth in 1914, where he was employed as an accountant.

In August 1914, he joined the Australian Imperial Force and served at the Gallipoli Campaign until he was evacuated due to illness.

[1] MacDonald was involved in raising funds for the Nationalist Party from 1925 and by 1930 was its general secretary in Western Australia.

Due to his support for Billy Hughes for the leadership after the death of Joseph Lyons, MacDonald was left out of Robert Menzies' ministries.