John Alexander Macdonald (disambiguation)
John A. Macdonald was Canada's first prime minister
John Alexander Macdonald may also refer to:
- John Alexander MacDonald (Prince Edward Island politician), speaker of the Prince Edward Island assembly
- John Alexander Macdonald (Prince Edward Island politician), Canadian member of parliament for King's, Prince Edward Island
- John Alexander Macdonald (Nova Scotia politician), Conservative member for Richmond-West Cape Breton, Nova Scotia
- John A. MacDonald (Nova Scotia politician), Progressive Conservative provincial member
- Jack MacDonald (Hamilton politician), businessman, journalist, and mayor of Hamilton, Ontario
- John Alexander McDonald (politician), Liberal senator from Nova Scotia