- National Archives and Records Administration14,521,351
- Smithsonian Institution3,767,507
- HathiTrust2,992,501
- The New York Public Library2,048,825
- California Digital Library1,701,836
- The Portal to Texas History1,423,411
- Mountain West Digital Library1,097,120
- Digital Commonwealth791,830
- Minnesota Digital Library701,361
- Digital Library of Georgia700,777
- Internet Archive626,353
- Recollection Wisconsin553,381
- Michigan Service Hub536,260
- North Carolina Digital Heritage Center455,996
- Empire State Digital Network443,200
- Indiana Memory422,673
- PA Digital407,024
- OKHub364,702
- Plains to Peaks Collective345,828
- Illinois Digital Heritage Hub322,695
- Biodiversity Heritage Library242,748
- Sunshine State Digital Network240,492
- Ohio Digital Network233,277
- Missouri Hub227,799
- South Carolina Digital Library210,297
- United States Government Publishing Office (GPO)201,413
- University of Washington141,873
- Kentucky Digital Library141,677
- ARTstor134,475
- Digital Library of Tennessee124,697
- Digital Maryland103,856
- J. Paul Getty Trust99,595
- David Rumsey97,145
- Big Sky Country Digital Network91,007
- Connecticut Digital Archive89,339
- Harvard Library65,739
- Vermont Green Mountain Digital Archive63,908
- Digital Maine63,492
- Digital Virginias58,486
- District Digital57,753
- Library of Congress4,481