- National Archives and Records Administration17,524,422
- Smithsonian Institution7,390,755
- HathiTrust3,033,985
- The Portal to Texas History1,830,556
- California Digital Library1,779,905
- Mountain West Digital Library1,212,534
- Michigan Service Hub1,124,565
- Digital Commonwealth963,196
- Digital Library of Georgia905,576
- Minnesota Digital Library886,223
- The New York Public Library796,138
- Plains to Peaks Collective743,782
- North Carolina Digital Heritage Center702,099
- Internet Archive682,651
- PA Digital663,919
- Recollection Wisconsin657,260
- Missouri Hub624,908
- OKHub603,322
- Illinois Digital Heritage Hub517,856
- Indiana Memory454,898
- Empire State Digital Network443,200
- Ohio Digital Network372,105
- NJ/DE Digital Collective275,008
- Biodiversity Heritage Library273,600
- Sunshine State Digital Network272,883
- South Carolina Digital Library268,566
- United States Government Publishing Office (GPO)266,460
- Northwest Digital Heritage238,362
- Digital Library of Tennessee145,956
- University of Washington141,840
- Kentucky Digital Library141,608
- Connecticut Digital Archive120,909
- David Rumsey117,338
- Digital Maryland114,531
- Artstor108,681
- Big Sky Country Digital Network100,655
- J. Paul Getty Trust99,618
- Harvard Library92,066
- Digital Virginias90,729
- Vermont Green Mountain Digital Archive79,752
- Digital Maine63,492
- Orbis Cascade Alliance61,614
- Texas Digital Library59,111
- District Digital57,753
- Community Webs4,878
- Library of Congress4,463