- National Archives and Records Administration16,825,453
- Smithsonian Institution6,280,872
- HathiTrust3,033,985
- California Digital Library1,996,178
- The Portal to Texas History1,739,313
- Mountain West Digital Library1,251,568
- Michigan Service Hub1,055,574
- Digital Commonwealth925,452
- Digital Library of Georgia820,636
- Minnesota Digital Library812,880
- New York Public Library780,891
- Plains to Peaks Collective719,577
- Internet Archive648,893
- PA Digital640,719
- Recollection Wisconsin635,071
- North Carolina Digital Heritage Center611,590
- Missouri Hub573,500
- OKHub547,008
- Indiana Memory444,863
- Empire State Digital Network443,200
- Illinois Digital Heritage Hub434,740
- Sunshine State Digital Network307,358
- Ohio Digital Network285,156
- Biodiversity Heritage Library262,244
- South Carolina Digital Library261,684
- United States Government Publishing Office (GPO)234,754
- Digital Library of Tennessee145,124
- University of Washington141,873
- Kentucky Digital Library141,677
- Northwest Digital Heritage137,187
- ARTstor134,475
- NJ/DE Digital Collective126,333
- Connecticut Digital Archive120,909
- David Rumsey112,610
- Digital Maryland112,333
- Big Sky Country Digital Network100,655
- J. Paul Getty Trust99,618
- Harvard Library92,066
- Digital Virginias76,779
- Vermont Green Mountain Digital Archive71,337
- Digital Maine63,492
- Orbis Cascade Alliance61,614
- District Digital57,753
- Texas Digital Library13,905
- Library of Congress4,481