| Honorific Prefix: | His Excellency |
| Charles Hay | |
| Office: | High Commissioner of the United Kingdom to Malaysia |
| Term Start: | April 2019 |
| Term End: | August 2023 |
| Primeminister: | Theresa May Boris Johnson Liz Truss Rishi Sunak |
| Predecessor: | Victoria Treadell |
| Successor: | Ailsa Terry |
| Office1: | British Ambassador to South Korea |
| Term Start1: | February 2015 |
| Term End1: | March 2018 |
| Monarch1: | Elizabeth II |
| Primeminister1: | David Cameron Theresa May |
| Predecessor1: | Scott Wightman |
| Successor1: | Simon Smith |
| Birth Name: | Charles Hay |
| Nationality: | British |
| Occupation: | Diplomat |
| Spouse: | Pascale Sutherland |
| Allegiance: |  United Kingdom |
| Serviceyears: | 1987-1993 |
| Rank: | Captain |
Charles John Hay, (born 22 September 1965) is a former High Commissioner of the United Kingdom to Malaysia, having been appointed in April 2019. He is the former British Ambassador to South Korea.[1]
Hay joined the Foreign and Commonwealth Office in 1993.
From 2015 to 2018, he served as British Ambassador to South Korea.[2]
On 8 November 2018, Hay was announced as the next High Commissioner of the United Kingdom to Malaysia, in succession to Victoria Treadell. He took up the post in April 2019.[3]