- Colorado State University. Libraries117,129
- Denver Public Library108,360
- University of Wyoming, American Heritage Center85,293
- University of Colorado Boulder University Libraries77,288
- History Colorado73,839
- Wyoming State Archives56,105
- Aspen Historical Society43,830
- Fort Collins History Connection39,251
- Wyoming State Library35,182
- Pikes Peak Library District26,301
- Estes Park Museum25,924
- Denver Museum of Nature and Science23,746
- University of Denver19,343
- Park County Archives, Wyoming15,446
- Colorado State Publications Library14,272
- Golden History Museum & Park12,342
- Museums of Western Colorado9,197
- Eagle County Historical Society8,637
- Douglas County Libraries. Archives and Local History8,075
- Broomfield History Collections7,905
- The Brinton Museum7,256
- Carnegie Library for Local History, Boulder Public Library6,092
- Fort Caspar Museum5,947
- University of Northern Colorado5,938
- Campbell County Rockpile Museum5,548
- Louisville Historical Museum5,310
- City of Greeley Museums5,119
- Broomfield Veterans Museum4,762
- Aurora History Museum3,785
- Pueblo City-County Library District2,716
- Colorado Snowsports Museum and Hall of Fame2,283
- Park County Local History Digital Archive, Colorado1,861
- Kit Carson County Archives1,804
- The Center on Colfax1,778
- Loveland Museum1,611
- CU Art Museum, University of Colorado Boulder1,509
- University of Wyoming1,415
- Leslie J. Savage Library1,352
- Fort Lewis College Foundation1,169
- Meeteetse Museums1,069
- Lakewood Heritage Center955
- USDA National Wildlife Research Center907
- Security Public Library759
- Colorado State University-Pueblo. Library756
- Salida Regional Library627
- American Alpine Club607
- Pine River Library562
- Clear Creek County Library District509
- Tread of Pioneers Museum438
- Colorado Railroad Museum436
- Lafayette Miners Museum416
- Colorado Parks & Wildlife Digital Collection362
- City of Thornton Archives Digital Collection305
- Salida Museum Association304
- Gunnison County Library District283
- National Federation of the Blind of Colorado175
- University of Wyoming Art Museum173
- Mesa County Libraries130
- University of Colorado Colorado Springs. Kraemer Family Library118
- Arvada Historical Society107
- Alamosa Public Library99
- Vail Public Library82
- Pitkin County Library79
- Colorado Golf Hall of Fame44
- Front Range Community College37
- Ignacio Community Library34
- Pines and Plains Libraries Digital Collection27
- Aspen Hall of Fame16
- Old Town Hot Springs14
- Eagle Valley Library District12
- Front Range Community College Larimer Campus12
- Black Citizens and Friends (Grand Junction, Colorado)7
- High Plains Library District7
- Stories of Colorado6
- Salida High School3
- Salida Fire Department2
- Fort Lewis College1
- Martin Mortuary (Grand Junction, Colorado) Mesa County Oral History Project1
- No valid dataProvider given1
