Henry Lascelles, 3rd Earl of Harewood DL (June 11, 1797 – February 22, 1857), known as Viscount Lascelles from 1839 to 1841, was a British peer and Member of Parliament.
Harewood was the second son of Henry Lascelles, 2nd Earl of Harewood, and Henrietta Sebright. He sat as Member of Parliament for Northallerton from 1826 to 1831 and also served as Lord Lieutenant of the West Riding of Yorkshire between 1846 and 1857.
Lord Harewood he married Lady Louisa Thynne (c. 1808 – 1859), daughter of Thomas Thynne, 2nd Marquess of Bath, On July 5, 1823. They had thirteen children:
| Parliament of the United Kingdom | ||
|---|---|---|
| Preceded by William Lascelles Marcus Beresford |
Member of Parliament for Northallerton 1826 – 1831 With: Sir John Poer Beresford |
Succeeded by Sir John Poo Beresford William Lascelles |
| Honorary titles | ||
| Preceded by The Lord Wharncliffe |
Lord Lieutenant of the West Riding of Yorkshire 1846 – 1857 |
Succeeded by The Earl FitzWilliam |
| Peerage of the United Kingdom | ||
| Preceded by Henry Lascelles |
Earl of Harewood 1841 – 1857 |
Succeeded by Henry Lascelles |