Horace Brooks Marshall, 1st Baron Marshall of Chipstead KCVO PC (5 August 1865–29 March 1936) was an English publisher and newspaper distributor and Lord Mayor of London, 1918–1919.
Marshall was born in Streatham, Surrey, a suburb of London. He was educated at Dulwich College and Trinity College, Dublin and then joined his father's wholesale newspaper business in Fleet Street. Horace Brooks Marshall Snr (1830–1896) pioneered the sales of books and publications on the railways. As Horace Marshall and Son, it became one of the largest such businesses in the United Kingdom. After his father's death in 1896, Marshall succeeded him unopposed as member of the Court of Common Council of the City of London for Farringdon Without. In 1902 he was Sheriff and was knighted on the occasion of Edward VII's coronation. He became alderman for Vintry Ward in 1909.
He was Lord Mayor of London in 1918–1919. As Lord Mayor during the First World War victory celebrations, he was particularly prominent, being appointed to the Privy Council (entitling him to the style "The Right Honourable") in 1919 and appointed Knight Commander of the Royal Victorian Order (KCVO) in the 1920 New Year Honours. Marshall was raised to the peerage in the 1921 New Year Honours as Baron Marshall of Chipstead, of Chipstead in the County of Surrey, the first sitting alderman of the City of London to be so honoured.