Sir Alexander McKenzie Livingstone (18 October 1880 – 14 September 1950) was a Scottish Liberal Party politician.
Livingstone was born in Kelvin, Glasgow in October 1880 to Duncan Livingstone and Catherine McKenzie.
At the 1918 general election, he was an unsuccessful candidate in the Dover constituency. He was again unsuccessful at the 1922 general election, when he stood in Inverness.
Livingstone was elected to Parliament on his third attempt, at the 1923 general election, when he was returned as Member of Parliament for the Western Isles. He held the seat at the 1924 election, and stood down from Parliament at the 1929 general election.
He was the Whip of the 'Radical' Parliamentary Group, formed in opposition to the leadership of David Lloyd George. He declared himself unable to endorse the Liberal Unemployment Pledge, and consequently withdrew in 1929 as Liberal candidate for the Western Isles. He joined the Labour Party in 1930. Livingstone died in Islington, London in September 1950 at the age of 69.