This page leads to digital collections from other libraries and organizations, arranged geographically. The list began with collections we were able to identify from Association of Research Libraries (ARL) member libraries, then grew to include collections from State Libraries and select additional sources (with thanks to Christine A. Pruzin from the Library of Congress, whose guide was very helpful in identifying resources).
There is a wealth of primary source material included in these collections. Many of the collections focus on topics of particular interest to that specific geographic area, but others - especially the university library collections - go far beyond that scope. Spend some time browsing and see what you can find!
District of Columbia