Thomas Augustus Wolstenholme Parker, 6th Earl of Macclesfield (17 March 1811 – 24 July 1896) was a British peer. Before inheriting the earldom, he sat in the House of Commons as Conservative Member of Parliament for Oxfordshire from 1837 until 1841.
He married Lady Mary Frances Grosvenor (1821–1912), daughter of Richard Grosvenor, 2nd Marquess of Westminster and sister of Hugh Grosvenor, 1st Duke of Westminster. He died at the age of 85. The younger son of Thomas Parker, 6th Earl, and his wife Mary Frances Grosvenor, was Hon. Cecil Thomas Parker, who married Rosamond Esther Harriet Longley, daughter of Charles Thomas Longley, Archbishop of Canterbury. Hon. Cecil Parker was the brother-in-law of Major Edward Levett of Rowsley, Derbyshire, whose first wife was Caroline Georgina Longley, also a daughter of Archbishop Longley. When Edward Levett died in Pau, France, in December 1899, he named his former brother-in-law Parker as his executor. His great-great grandson is Andrew Parker Bowles