Alexander McDonald (12 June 1878 – 9 September 1956) was an Australian politician.
He was born in Ararat to farmer Hugh McDonald and Annie Poison.
He attended state school and became a grazier at Chrocan near Mount Ararat.
In 1935 he was elected to the Victorian Legislative Assembly as the Country Party member for Stawell and Ararat.
McDonald moved to Ballarat in 1956, but died in Ararat that year.