William Heneage Legge, 6th Earl of Dartmouth,, styled Viscount Lewisham between 1853 and 1891, was a British peer and Conservative politician. He served as Vice-Chamberlain of the Household between 1885 and 1886 and again between 1886 and 1891.

The Vice-Chamberlain of the Household is a member of the Royal Household of the Sovereign of the United Kingdom. The officeholder is usually a senior government whip in the British House of Commons ranking third or fourth after the Chief Whip and the Deputy Chief Whip. The Vice-Chamberlain is the Deputy to the Lord Chamberlain of the Household and, like the Lord Chamberlain, carries a white staff of office when on duty on state occasions.