The British Library’s (National Library of England) founding date back to the 1750s. Previously operating within the British Museum, the library was separated from the British Museum through a legal regulation and became an independent structure under the name British Library.Officially opened by the Queen in 1998, the British Library houses more than 150 million documents. The British Library is considered the second largest library in the world in t erms of the books and other content it contains. The British Library building is located in central London, right next to St Pancras-Kings Cross station, which is considered a meeting point for national and international train services. There is no catalog prepared for Turkish manuscripts in the British Library that currently contains all Turkish manuscripts in the library. The Turkish manuscript catalogs and brochures prepared in 1888 and 1958 are insufficient for today’s researchers. The Turkish manuscrip ts in the British Library are very diverse.From Göktürk Turkish, representing Eastern Turkic languages as a basis and starting point, to Old Uyghur Turkic, Karakhanid -Khwarazmian-Kipchak Turkic, Chagatai Turkic, and Azerbaijani Turkic, representing Weste rn Oghuz Turkic languages, Old Anatolian Turkic, Ottoman Turkic, and Turkish of Turkey, it is possible to access numerous manuscripts written in these languages. In addition to these, the British Library houses works in almost all Turkic dialects (Bashkir, Uzbek, Tatar, Kazakh, Kyrgyz, Chuvash, etc.).This study provides a general overview of Turkish manuscripts in the British Library. It aims to trace the history and development of existing Turkish manuscripts by presenting the history of the library. Turki sh manuscripts have been roughly classified according to their period; examples of some manuscripts from the relevant period are presented. Notes on catalog and brochure work on Turkish manuscripts, and how and where the Turkish manuscripts in the library were acquired, are also included. The works have also been classified according to their content. The British Library, with its collection of approximately 4000 Turkish manuscripts covering a wide range of fields such as divans, journals, biographies, decrees, history books, literature, music, astronomy, commentary, the Quran, etc., attracts the attention of researchers in this respect. British Library, Turkish Manuscripts, London, England, Eastern Turkish, Western Turkish, Charles Pierre Henry Rieu, Glyn M unro Meredith-Owens, United Kingdom.