| Honorific Prefix: | The Right Honourable |
| The Lord Dunleath | |
| Office: | Member of Parliament for Londonderry North |
| Term Start: | 1885 |
| Term End: | 1895 |
| Predecessor: | New constituency |
| Successor: | John Atkinson |
| Birth Name: | Henry Lyle Mulholland |
| Birth Date: | 30 January 1854 |
| Party: | Conservative |
| Parents: | John Mulholland, 1st Baron Dunleath Frances Louisa Lyle |
| Children: | 5 |
| Relations: | Charles Mulholland, 4th Baron Dunleath (grandson) Monica Wichfeld (granddaughter) Andrew Mulholland (grandfather) |
Henry Lyle Mulholland, 2nd Baron Dunleath (30 January 1854 – 22 March 1931), was an Irish Conservative Member of Parliament.
Dunleath was the second son of John Mulholland, 1st Baron Dunleath and the former Frances Louisa Lyle (d. 1909). His older brother was the Hon. Andrew Walter Mulholland, who died without issue at age 24 in 1877. His younger siblings included Hon. Alfred John Mulholland (who married Mabel Charlotte Saunderson); Hon. Alice Elizabeth Mulholland (wife of John George Beresford Massy-Beresford and mother to Monica Wichfeld); Hon. Helen Mulholland (wife of Sir George Herbert Murray); and Hon. Louisa Frances Mulholland (wife of Edward Roger Murray Pratt).
His mother was a daughter of Harriet Cromie (a daughter of John Cromie) and Hugh Lyle of Knocktarna in County Londonderry. His father was the eldest son of the former Elizabeth MacDonnell (a daughter of Thomas MacDonnell of Belfast) and Lord Mayor of Belfast Andrew Mulholland of Ballywalter Park. The Mulholland family were prominent in the cotton and linen industry in Ireland.
He served as High Sheriff of Down in 1884. The following year, he was returned to the British House of Commons for Londonderry North, a seat he held until the 1895 general election. Later that year, he succeeded his father in the barony and entered the House of Lords.
In 1881, Lord Dunleath was married to Norah Louisa Fanny Ward, the only surviving daughter of Hon. Somerset Richard Hamilton Augustus Ward (fifth son of Edward Ward, 3rd Viscount Bangor), by his wife Norah Mary Elizabeth Hill (only daughter of Lord George Hill, fifth son of Arthur Hill, 2nd Marquess of Downshire). Together, they were the parents of five children, four sons and one daughter, including:[1]
Lord Dunleath died on 22 March 1931, aged 77, and was succeeded in the barony by his second son Charles. Lady Dunleath died in 1935.[5]
Through his second son, he was a grandfather of Charles Mulholland, 4th Baron Dunleath (1933–1993).[6]
He inherited the schooner Egeria from his father, and had the Charles E Nicholson designed 4 ton lugger Wolfhound built for him at Camper and Nicholsons, Gosport in 1893.[7]