Viscount Lorton is a title in the Peerage of Ireland. It was created in 1806 for General the Hon. Robert Edward King, who had already been made Baron Erris in the Peerage of Ireland in 1800. He was the third child and second son of Robert King, 2nd Earl of Kingston. His son, the second Viscount, succeeded to the Earldom of Kingston on the death of his cousin in 1869. The titles have remained united ever since.
Edward Robert King-Harman was the son of Lawrence Harman King-Harman, younger son of the first Viscount.
For further Viscounts Lorton, see the Earl of Kingston.