The archive of the Liverpool Philomathic Society includes incoming and outgoing correspondence, 1894-1929, primarily concerned with membership matters and arrangements for debates and dinners, but also documenting the Liverpool Civic Service League Intelligence Bureau in Bold Street, Liverpool. This was run by LPS members during 1914, and was set up as a contribution to the War effort, to provide an information service "to applicants for relief and assistance". The correspondence files also record members' reactions to postwar strikes and the admission of women, and document the drift of successful former members from business in Liverpool to London or colonial postings. Nomination papers have been extracted into a separate, chronological series.

The printed records of the LPS include historical accounts given in Presidential addresses, catalogues of the Library prior to its sale in 1925, and periodical revisions of the Society's Laws. The Proceedings of the Liverpool Philomathic Society and copies of addresses are kept with the book collections of Liverpool University Library.

Records of the Society's dinners include toast lists from 1885 and detailed seating plans from 1899. Some menu cards, accounts, tickets and programmes also survive; there was music at the dinners of 1907, 1908 and 1926.