Thomas Hay
Thomas Hay may refer to:
- Thomas Hay (bishop), 15th-century Scottish prelate
- Thomas de la Hay, Scottish baron and soldier
- Thomas Hay, 9th Earl of Kinnoull, Scottish MP
- Thomas Hay (Canadian politician), Canadian politician
- Thomas William Hay, British Member of Parliament for South Norfolk, 1922–1923
- Thomas Hay (Lewes MP), British Army officer and politician
- Thomas Hay, 7th Earl of Kinnoull, Scottish peer and Conservative politician
- Thomas Hay, Lord Huntingdon, Scottish lawyer and judge