| William St Lawrence | |
| Birth Date: | 4 October 1752 |
| Education: | Trinity College, Dublin |
| Father: | Thomas St Lawrence |
| Relatives: | Henry King (grandfather) Richard Boyle (grandson) William Boyle (grandson) Christopher St George (grandson) |
| Spouse: | Margaret Burke |
| Children: | 8, including Thomas |
William St Lawrence, 2nd Earl of Howth (4 October 1752 - 4 April 1822) was an Anglo-Irish peer, styled Viscount St Lawrence from 1767 to 1801.
St Lawrence was the eldest son of Thomas St Lawrence, 1st Earl of Howth and Isabella King, daughter of Sir Henry King, 3rd Baronet and Isabella Wingfield. He was educated at Trinity College, Dublin.[1]
He was Earl during the construction of Howth Harbour from 1807 as well as the visit of George IV to Ireland via Howth pier in 1821.
On 1 June 1777, he married Lady Mary Bermingham, daughter of Thomas Bermingham, 1st Earl of Louth and Margaret Daly. She died on 20 July 1793.[2] They had four children:[3]
He later married Margaret Burke daughter of William Burke and Margaret Coleman of Keelogues, County Galway. They had four children: