Sidney Carr Hobart-Hampden-Mercer-Henderson, 7th Earl of Buckinghamshire OBE DL (14 March 1860 – 15 January 1930), styled Lord Hobart from 1875 to 1885, was a British Liberal politician.
His mother was Catherine, daughter of the Right Reverend Thomas Carr, Bishop of Bombay.
Hew Adam Dalrymple Hamilton Haldane-Duncan-Mercer-Henderson (son of the 1st Earl of Camperdown) and Edith Isabella Mercer-Henderson, in 1888.
[1] In 1903 Hobart assumed by Royal Licence the additional surnames of Mercer-Henderson for himself and his issue.
Buckinghamshire died in January 1930, aged 69, and was succeeded in the earldom by his only son, John.