The Colthurst Baronetcy, of Ardrum in the County of Cork, is a title in the Baronetage of Ireland. It was created on 3 August 1774 for John Colthurst, who represented Doneraile, Youghal and Castle Martyr in the Irish House of Commons. The third Baronet was a member of the Irish Parliament for Longford and Castle Martyr. The fourth Baronet represented Cork City in the British House of Commons from 1812 to 1829. The fifth Baronet sat as Liberal Member of Parliament for Kinsale between 1863 and 1874. The sixth Baronet served as High Sheriff of County Cork. The eighth Baronet was High Sheriff of County Dublin. As of 2014 the title is held by his grandson, the tenth Baronet.
Colthurst baronets, of Ardrum (1744)
- Sir John Colthurst, 1st Baronet (died 1775)
- Sir John Conway Colthurst, 2nd Baronet (c. 1743–1787)
- Sir Nicholas Colthurst, 3rd Baronet (died 1795)
- Sir Nicholas Colthurst, 4th Baronet (1789–1829)
- Sir George Conway Colthurst, 5th Baronet (1824–1878)
- Sir George St John Colthurst, 6th Baronet (1850–1925)
- Sir George Oliver Colthurst, 7th Baronet (1882–1951)
- Sir Richard St John Jefferyes Colthurst, 8th Baronet (1887–1955)
- Sir Richard la Touche Colthurst, 9th Baronet (1928–2003)
- Sir Charles St John Colthurst, 10th Baronet (born 1955)
The heir apparent is the present holder's only son John la Touche Conway Colthurst (born 1988).
- Kidd, Charles; Williamson, David, eds. (22 February 1990). Debrett's Peerage and Baronetage. New York: St Martin's Press: Macmillan. ISBN 978-0333388471.
- Mosley, Charles, ed. (2003). Burke's Peerage and Baronetage and Knightage (107th ed.). ASIN B013RNNH3I.
- Kidd, Charles; Williamson, David (1 December 2007). Debrett's Peerage and Baronetage (145th Revised ed.). Debrett's Ltd. ISBN 978-1870520805.
- Leigh Rayment's list of baronets