St Columba's College is a co-educational independent day and boarding school founded in 1843 located in Whitechurch, County Dublin, Ireland. Among the founders of the college were Viscount Adare, William Monsell, Dr William Sewell and James Henthorn Todd.

William Monsell, 1st Baron Emly, PC was an Anglo-Irish landowner and Liberal politician. He held a number of ministerial positions between 1852 and 1873, notably as President of the Board of Health in 1857 and as Postmaster General between 1871 and 1873.