Charles John Hay, MVO (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.

[2] From 2015 to 2018, he served as British Ambassador to South Korea.

[1][2] On 8 November 2018, Hay was announced as the next High Commissioner of the United Kingdom to Malaysia, in succession to Victoria Treadell.