- National Archives and Records Administration10,280,840
- Smithsonian Institution3,105,487
- HathiTrust2,745,120
- The New York Public Library2,048,825
- University of Southern California Libraries1,170,914
- California Digital Library1,146,537
- The Portal to Texas History1,138,722
- Mountain West Digital Library975,287
- Digital Commonwealth647,303
- Minnesota Digital Library621,464
- Digital Library of Georgia608,584
- Internet Archive521,588
- Recollection Wisconsin507,054
- North Carolina Digital Heritage Center439,794
- Empire State Digital Network425,096
- PA Digital356,763
- Indiana Memory318,502
- Illinois Digital Heritage Hub290,977
- Michigan Service Hub266,290
- Biodiversity Heritage Library220,248
- Digital Library of Tennessee185,573
- United States Government Publishing Office (GPO)182,007
- South Carolina Digital Library179,815
- Sunshine State Digital Network169,973
- Missouri Hub169,836
- University of Washington141,873
- Kentucky Digital Library141,677
- ARTstor134,475
- OKHub114,806
- Digital Maryland102,537
- Ohio Digital Network100,956
- J. Paul Getty Trust99,082
- David Rumsey87,458
- Big Sky Country Digital Network70,440
- Digital Maine63,492
- District Digital57,757
- Plains to Peaks Collective46,842
- University of Virginia Library30,174
- Harvard Library17,620
- Library of Congress4,481