Darmstadt - Düsseldorf
- Darmstadt University and State Library
- Darup (see Specials: Handschriftencensus Westfalen)St. Fabian and Sebastian
- Dessau City Library (today Main Library of the Anhalt State Library)State Library (today Scientific Library of the Anhalt State Library)
- DetmoldLippeState LibraryNorth Rhine-Westphalia State Archives and North Rhine-Westphalia Personal Archives Westphalia-Lippe (see Specials: Manuscript Census Westphalia)
- Dillingen Study Library
- Dinslaken (see Specials: Manuscript Census Rhineland, Vol. 1) City Archives
- DonaueschingenFürstenberg Court Library (now dissolved) see BLB Karlsruhe and WLB Stuttgart
- Dorsten (see Specials: Manuscript Census Westphalia)Franciscan, City Archives, St. Agatha
- Dortmund (see Specials: Manuscript Census Westphalia)Catholic Provost Church Parish of St. John Baptist, City and State Library, City Archive
- Dresden University and State Library
- Düren (see Specials: Manuscript Census Rhineland, Vol. 1) City and District Archives
- Düsseldorf University and State Library Main State Archives, Art Academy, Art Museum, private property, St. Lambertus Parish Archives University and State Library; Düsseldorf-Gerresheim: Kath. Pfarrei St. Margareta (see Specials: Manuscript Census Rhineland, Vol. 1).
- Duisburg (see Specials: Manuscript Census Rhineland, Vol. 1) Private propertyCity LibraryDuisburg-Hamborn: Catholic Provost Parish of St. JohannDuisburg-Laar: Catholic Parish of St. Ewaldi