William H. Allen (1788 - 1862? ) was a bookseller and publisher in London, England, whose company (founded around 1835) would develop a special relationship producing maps for the British East India Company, whose offices shared the same street as the publishers' Leadenhall Street address. Nothing is known of his early education, but he was admitted to the London Company of Stationers as a bookseller in 1817 and would become member of a publishing partnership, joining Black, Kingsbury, Parbury and Allen, in 1818. This would evolve into Kingsbury, Parbury, and Allen in 1822, and again into Parbury, Allen, and Co. in 1827. All of these were based in Leadenhall Street.