| Pre-Nominals: | The Right Honourable |
| Birth Date: | 29 May 1643 |
| Death Date: | 15 May 1695 |
| Nationality: | Scottish |
| 3rd Earl of Strathmore and Kinghorne | |
| Spouse: | Helen Middleton |
| Children: | 8 (including John Lyon, 4th Earl of Strathmore and Kinghorne and Patrick Lyon) |
| Parents: | John Lyon, 2nd Earl of Kinghorne Lady Elizabeth Maule |
Patrick Lyon, 3rd Earl of Strathmore and Kinghorne (29 May 1643 – 15 May 1695) was a Scottish peer and nobleman. He was the son of John Lyon, 2nd Earl of Kinghorne and his wife Lady Elizabeth Maule, daughter of Patrick Maule, 1st Earl of Panmure and Frances Stanhope. Patrick was the grandson of Patrick Lyon, 1st Earl of Kinghorne and his wife Anne Murray.
On 12 May 1646, 17 days before his third birthday, Patrick inherited the titles of third Earl of Kinghorne and eleventh Lord Glamis from his father, as well as Glamis Castle and Castle Lyon (now Castle Huntly), which had been purchased by 1st Earl of Kinghorne in 1614. On 30 May 1672 he obtained a new charter, ratified in Parliament on 1 July 1677, giving an addition to his title, which was in future to be Earl of Strathmore and Kinghorne, Viscount Lyon, Lord Glammis, Tannadyce, Sidlaw, and Stradichtie, with the precedence of the former honour of Earl of Kinghorne.
Patrick Lyon married Helen Middleton, daughter of John Middleton, 1st Earl of Middleton, and his wife Grizel Durham, on 23 August 1662. They had issue:
. James Balfour Paul. The Scots peerage. XIII. 1904 . D. Douglas . Edinburgh. 299–303.