- University of Washington222,989
- University of Oregon Libraries96,947
- State Library of Oregon48,640
- Densho30,613
- Washington State Library29,592
- Oregon Historical Society Research Library19,009
- Clark County Historical Museum18,369
- Museum of Flight16,498
- Museum of History & Industry (MOHAI)15,907
- Seattle Public Library14,317
- University of Idaho Library, Special Collections and Archives13,135
- Washington State University Libraries, Manuscripts, Archives, and Special Collections12,368
- Baker County Library District8,706
- University of Oregon Libraries, Special Collections and University Archives5,750
- Willamette University Archives and Special Collections5,736
- Reed College5,077
- Port Angeles Public Library4,883
- Center for Asian Pacific Studies, University of Oregon4,852
- Harney County Library4,728
- Oregon State University Libraries, Special Collections and Archives Research Center4,657
- Oregon State University Libraries4,638
- Yakima Valley Museum4,021
- Washington Geological Survey3,886
- University of Puget Sound, Archives & Special Collections3,852
- Seattle Pacific University3,743
- Washington State Jewish Archives3,718
- Ellensburg Public Library3,717
- Multnomah County Library3,675
- Whitman County Library3,379
- Everett Public Library2,688
- Library of Congress2,671
- Yakima Valley Libraries2,442
- Pacific Citizen2,305
- Olympic National Park2,244
- Emerald Media Group1,836
- Roslyn Public Library1,836
- Oregon Institute of Technology Libraries, Shaw Historical Library1,580
- Linfield College1,454
- Manzanar National Historic Site1,326
- Asotin County Library1,320
- Eastern Washington University1,298
- National Archives and Records Administration1,200
- Japanese American Museum of Oregon1,172
- Southern Oregon University, Hannon Library1,103
- George Fox University Archives963
- Pend Oreille County Library District959
- Washington State Department of Transportation Library939
- Friends of Minidoka920
- Eastside Heritage Center800
- Denny Ashby Library785
- Lewis & Clark College, Special Collections and Archives783
- Fort Vancouver Regional Library District, Stevenson Community Library769
- Forks Timber Museum726
- Puyallup Public Library693
- Japanese American Museum of San Jose675
- Initiative for Rural Innovation and Stewardship (IRIS)670
- Puget Sound Maritime Historical Society651
- National Museum of the American Indian558
- Asotin County Fair Board557
- Whatcom County Library System, Everson McBeath Community Library549
- Heart Mountain Wyoming Foundation544
- USDA, United States Forest Service, Colville National Forest524
- Renton Historical Museum499
- The Alvin M. and Betty Josephy Library of Western History and Culture488
- Whatcom County Library System, Island Library465
- Maple Valley Historical Society433
- Harney County Historical Museum425
- White River Valley Museum408
- Kettle Falls Public Library403
- Rainier Valley Historical Society387
- Des Moines Historical Society Museum (Washington State)380
- Washington State University. Extension347
- Asotin County Museum338
- Coastal Interpretive Center (Ocean Shores, WA)269
- Whatcom County Library System, Deming Library262
- Shoreline Historical Museum259
- Seattle Nisei Veterans Committee257
- Timberland Regional Library256
- Palouse Empire Fair252
- Holy Family Parish, Clarkston, Washington251
- Tacoma Public Library251
- Whatcom County Library System, Sumas Library244
- Tekoa Museum230
- Cathlamet Public Library229
- Ocean Shores Public Library219
- Wing Luke Asian Museum219
- Staley Museum213
- Oregon State Highway Department209
- Hoover Institution206
- Bainbridge Island Japanese American Community202
- Northwest Museum of Arts and Culture (MAC)202
- City of Portland Archives198
- Black Heritage Society of Washington State, Inc180
- Clallam County Historical Society178
- San Juan Island Library District172
- City of North Bonneville171
- McCoy Valley Museum, Oakesdale Historical Society156
- Wahkiakum County Historical Society143
- Franklin County Graphic140
- Eastern California Museum138
- Makah Cultural and Research Center124
- Mid-Columbia Libraries, Benton City Branch123
- Moran Prairie Washington State Grange #161121
- Medical Lake Historical Society120
- San Juan Historical Museum120
- University of Portland120
- Pine City Historical Society117
- Columbia County Rural Library District115
- Garfield County Museum109
- Asotin County Public Utility District107
- Klickitat County Historical Society, Presby Museum107
- Roslyn Museum106
- Prosser Historical Museum100
- Rockford Area Museum and Historical Society100
- City of Colfax, Washington87
- Northwest Railway Museum85
- University of Washington Tacoma85
- Hooper Store, The McGregor Company84
- Roy Chatters Newspaper and Printing Museum83
- African Studies Program, University of Oregon68
- Fort Vancouver Regional Library District, Goldendale Community Library68
- Museum of the North Beach68
- Lummi Island Community Club Archives67
- Guy Albion Historical Society & Museum65
- Benton County Historical Society (Oregon)64
- Eastern Washington Agricultural Museum60
- Whitman Hospital and Medical Center60
- United States. Natural Resources Conservation Service. Washington52
- North Central Washington Libraries51
- Colfax High School48
- Northport Historical Society46
- Blue Mountain Heritage Society44
- City of Clarkston, Washington41
- Vashon-Maury Island Heritage Association41
- Inyo County Free Library40
- Seattle Buddhist Temple Archives40
- Woodland Historical Museum Society40
- Blue Sky Gallery38
- Connell Heritage Museum38
- Town of Farmington38
- Ridgefield Heritage Society37
- Sumas, Washington City Hall37
- Rosalia Visitors Resource and Interpretive Center32
- Mid-Columbia Libraries, Prosser Branch31
- Multnomah County Archives30
- Portland State University29
- Washington State Historical Society28
- Fort Vancouver Regional Library District, Ridgefield Community Library27
- Grandview Library24
- Japanese American National Museum24
- La Center Historical Museum24
- Grant County Museum23
- Grandview Museum22
- Colfax Fire Department18
- Sumas Senior Center, Sumas, Washington18
- Dayton Historical Depot Society17
- Lake Chelan Historical Society15
- Nooksack Valley Nostalgia15
- San Juan Island National Historic Park15
- Elijah Hasan14
- Cedonia Community Church13
- Mid-Columbia Libraries, Connell Library13
- Whatcom Museum of History & Art13
- Whitman County Historical Society13
- Center for Pacific Northwest Studies, Western Washington University12
- Clayton and Deer Park Historical Society11
- Ancestry10
- Battle Days Museum10
- Ferry County Historical Society10
- Nordic Heritage Museum9
- Seattle Municipal Archives9
- Snoqualmie Valley Historical Society9
- University of Washington Libraries9
- Archdiocese of Seattle8
- Greater Kent Historical Society8
- Okanogan County Historical Society8
- Seattle Japanese Language School8
- Black Diamond Historical Society7
- Bothell Historical Museum7
- City of Ellensburg7
- Connell Downtown Development Association7
- Daughters of the Pioneers of Washington State7
- National Park Service, Manzanar National Historic Site7
- Southwest Seattle Historical Society7
- Washington State Archives7
- Asotin Country Fair Board6
- Highline Historical Society6
- Issaquah Historical Society6
- King County Archives6
- Maple Valley Historical Society Museum6
- Duvall Historical Society5
- Kettle Falls Historical Center5
- National Japanese American Historical Society5
- Seattle Metropolitan Police Museum5
- Tukwila Historical Society5
- Washington State Jewish Historical Society5
- Archives of the Archdiocese of Seattle4
- Klondike Gold Rush Museum4
- Northwest Seaport4
- Pioneer Association of the State of Washington4
- Providence Archives4
- Sammamish Heritage Society4
- South Bay Japanese American Citizens League4
- UW Nikkei Alumni Association (UWNAA)4
- Burke Museum3
- Campfire Museum3
- Home of the Good Shepherd3
- Japanese American Film Preservation Project3
- Kenmore Heritage Society3
- King County Library System, Vashon Library3
- Kirkland Heritage Society3
- Neely Mansion Association3
- Puget Sound Welsh Association3
- Seattle First Baptist Church Archives3
- Seattle Public Schools Archives3
- Woodinville Heritage Society3
- Center for Wooden Boats2
- Enumclaw Plateau Historical Society2
- Kalakala Foundation2
- Kiona Benton City Historical Society2
- Memory Lane Museum at Seattle Goodwill2
- Mercer Island Historical Society2
- Palus Artifact Museum2
- Queen Anne Historical Society2
- Swedish-Finn Historical Society2
- Valley Historical Society2
- Vineland Cemetery (Clarkston, Washington)2
- Benton County Museum and Historical Society1
- Bushnell University1
- City of Sumas, Washington1
- Discovery Modelers Education Center1
- Federal Way Historical Society1
- Magnolia History Project1
- Northern Pacific Railway Museum1
- Stevens County Historical Society1
- Sumas Historical Society Museum1
- Town of Friday Harbor1
- Vashon College1
