 His London home was 38 Dover Street, Middlesex, (in St James's/Haymarket or Cornelia Street, Islington)

On 22 March 1836 King married Louisa Elizabeth, daughter of William Henry Hoare of Mitcham Grove, Surrey.She died in 1884.They had two sons and four daughters; they included Hugh F. Locke King, entrepreneur who inherited a share of his late parent's estate.