Alexander Donald McLeod (13 July 1872 – 20 October 1938) was a Reform Party Member of Parliament in the Wairarapa region of New Zealand.

[2] McLeod won the Wairarapa electorate in the 1919 general election in a triangular contest, defeating the incumbent, J. T. Marryat Hornsby of the Liberal Party.

During the caucus meeting which conducted the leadership ballot McLeod, having realised he had no realistic chance of winning, withdrew as a candidate.

[5] In a reshuffle in 1926 Coates additionally appointed McLeod as Minister of Industries and Commerce.

[2] McLeod was the New Zealand government representative to Australia in May 1927 at the inauguration of the new Parliament House when the federal capital moved to Canberra.

He made a speech in parliament about it and, under parliamentary privilege, named wealthy businessman William Goodfellow as being the funder of the party.

[23] He was survived by his wife and children,[1] his son Norman Murdoch McLeod having drowned while duck-shooting at Kahutara in 1936.