The Staatsarchiv Landshut (Landshut State Archive) is the government authority for all matters related to archive studies in the administrative district of Lower Bavaria. Already under the Dukes of the dynasty that assumed regency after the line of Bavaria-Landshut had split in 1392, there are records of archives ("letter vaults") on Trausnitz Castle and in the secondary residence at Burghausen that date back to the fifteenth century. These also maintained the written material of the partial Duchy of Bavaria-Ingolstadt that was transferred from Ingolstadt and Neuburg on the Danube, when it came under the rule of Bavaria-Landshut in 1447.
In the nineteenth century, the stock of various special registries was turned into a comprehensive "invoicing archive" and registry on Trausnitz Castle. This was raised to the status of an archive conservatory in 1812, and in 1875 it was renamed "Kreisarchiv" (District Archive) together with all the other regional state archives, until in 1921 it became the "Staatsarchiv Landshut".
A historical heritage is the responsibility for the stewardship offices of Landshut and Straubing, that existed in the Duchy/Electorate of Bavaria between 1507 and 1799/1802. With the reforms of the Napoleonic era, the archive became responsible for the heritage of the Bavarian middle and lower-level authorities of the administrative district of Lower Bavaria and the preceding river districts. Furthermore it maintains the registries of the subordinate authorities of the imperial and federal civil administration and a considerable volume of written material collected by both private and official archivists.
For public use, the current terms of the general regulations for the use of the Bavarian State Archives from 16 January 1990 (GVBl p. 6) apply, which also lay down the fees that are due. Special terms are valid for certain individual collections and for deposita.
The Staatsarchiv Landshut is subordinate to the Generaldirektion der Staatlichen Archive Bayerns (Directorate General of the Bavarian State Archives).