Alastair McDonald
Alastair McDonald, or variants, may refer to:
After 1900
- Alistair MacDonald, British judge
- Alistair Macdonald, British Labour party politician
- Alastair Macdonald (surveyor), British land surveyor and author
- Alastair Macdonald (historian), Scottish historian
- Alastair McDonald (musician), Scottish banjo-playing folk/jazz musician
- Alisdair Macdonald, British press photographer
Pre-20th century
- Alastair Macdonald (British Army officer), 19th century Commander-in-Chief, Scotland
- Alasdair Mac Colla, 17th century Scottish military officer
- Alexander of Islay, Earl of Ross, also known as Alasdair MacDonald, 15th century Scottish nobleman
- Alistair Carragh Macdonald, 15th century Scottish nobleman
- Alasdair Óg of Islay, known as Alasdair MacDonald, 13th century Scottish Lord of Islay and chief of Clann Domhnaill
- Alasdair Mór, 13th century Scottish nobleman and eponymous ancestor of Clan MacAlister