| Honorific Prefix: | The Right Honourable |
| The Lord Dunleath | |
| Honorific Suffix: | DL |
| Office: | Member of Parliament for Downpatrick |
| Term Start: | 1874 |
| Term End: | 1885 |
| Predecessor: | William Keown |
| Successor: | Constituency abolished |
| Birth Name: | John Mulholland |
| Birth Date: | 16 December 1819 |
| Party: | Conservative |
| Parents: | Andrew Mulholland |
| Children: | 5 |
John Mulholland, 1st Baron Dunleath (16 December 1819 – 11 December 1895) was an Irish businessman and Conservative Member of Parliament.
Dunleath was born the son of Elizabeth MacDonnell (a daughter of Thomas MacDonnell of Belfast) and Andrew Mulholland, a future Mayor of Belfast, of Ballywalter Park in County Down.
He was involved in the Mulholland family cotton and linen industry and also represented Downpatrick in the British House of Commons from 1874 to 1885.
In 1892, he was raised to the peerage as Baron Dunleath, of Ballywalter in the County of Down.[1]
"Aside from linen and politics, the 1st Lord Dunleath's other great interest was sailing." according to the Introduction to the Dunleith Papers[2] held at the Public Record Office of Northern Ireland (PRONI).
The 77ft schooner Egeria was built for him in 1865 by Wanhill's Yard of Hamworthy, raced successfully for many years, and was retained and sailed by his son, Henry.[3]
In 1866 he became Vice-Commodore of the Royal Ulster Yacht Club.[4]
In 1851, Lord Dunleath was married to Frances Louisa Lyle (d. 1909), daughter of Hugh Lyle and Harriet Cromie (a daughter of John Cromie) of Knocktarna in County Londonderry.[1] Together, they were the parents of:
He died in December 1895, aged 75, and was succeeded in the barony by his second son Henry. Lady Dunleath died in 1909.[6]