Since February 8, 2008, Cleveland has been twinned with Killyleagh, Northern Ireland.
Reverend Edward Hincks, a renowned Assyriologist and Egyptologist, was appointed Church of Ireland rector of Killyleagh in 1825, an office he was to hold for the remaining forty-one years of his life.
Bernard Ward, 1st Viscount Bangor (1719–1781), Irish MP for Down, Bangor and Killyleagh