- National Archives and Records Administration14,526,088
- Smithsonian Institution3,767,507
- HathiTrust2,992,501
- The New York Public Library2,048,825
- California Digital Library1,728,995
- The Portal to Texas History1,462,374
- Mountain West Digital Library1,032,749
- Digital Commonwealth817,102
- Minnesota Digital Library735,944
- Digital Library of Georgia700,777
- Internet Archive634,480
- Recollection Wisconsin571,805
- Michigan Service Hub536,633
- North Carolina Digital Heritage Center455,996
- Empire State Digital Network443,200
- Indiana Memory422,673
- PA Digital412,976
- Illinois Digital Heritage Hub370,787
- OKHub364,702
- Plains to Peaks Collective360,841
- Sunshine State Digital Network285,850
- Biodiversity Heritage Library242,748
- Ohio Digital Network233,841
- Missouri Hub227,799
- South Carolina Digital Library210,297
- United States Government Publishing Office (GPO)207,046
- University of Washington141,873
- Kentucky Digital Library141,677
- ARTstor134,475
- Digital Library of Tennessee131,080
- Digital Maryland103,856
- J. Paul Getty Trust99,598
- David Rumsey97,145
- Big Sky Country Digital Network92,809
- Connecticut Digital Archive89,339
- Vermont Green Mountain Digital Archive70,062
- Harvard Library65,739
- Digital Maine63,492
- Digital Virginias58,486
- District Digital57,753
- Library of Congress4,481