A by-election was held for the New South Wales Legislative Assembly electorate of The Castlereagh on 24 November 1906 because of the death of Hugh Macdonald (). Dates Result Hugh Macdonald () died. See also Electoral results for the district of Castlereagh List of New South Wales state by-elections Notes References 1906 elections in Australia New South Wales state by-elections 1900s in New South Wales