William Harry Hay, 19th Earl of Erroll, styled Lord Hay between 1823 and 1831, and Lord Kilmarnock from 1831 to 1846, was a Scottish peer.
- Occupation
- politician, aristocrat
- Position held
- member of the House of Lords
- Citizenship
- United Kingdom of Great Britain and Ireland
- Born
- May 3, 1823
- Died
- December 3, 1891
