- National Archives and Records Administration14,521,351
- Smithsonian Institution3,767,507
- HathiTrust2,992,501
- The New York Public Library2,048,825
- California Digital Library1,678,558
- The Portal to Texas History1,423,411
- Mountain West Digital Library1,093,582
- Digital Commonwealth791,830
- Minnesota Digital Library701,361
- Digital Library of Georgia691,817
- Internet Archive626,353
- Recollection Wisconsin553,381
- Michigan Service Hub536,260
- North Carolina Digital Heritage Center455,996
- Empire State Digital Network443,200
- PA Digital407,024
- Indiana Memory369,664
- Plains to Peaks Collective345,828
- Illinois Digital Heritage Hub322,695
- Sunshine State Digital Network240,492
- Biodiversity Heritage Library238,446
- Missouri Hub227,799
- South Carolina Digital Library210,297
- Ohio Digital Network207,227
- United States Government Publishing Office (GPO)201,413
- University of Washington141,873
- Kentucky Digital Library141,677
- ARTstor134,475
- OKHub124,944
- Digital Library of Tennessee124,697
- Digital Maryland102,485
- J. Paul Getty Trust99,595
- David Rumsey94,967
- 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