| Multi-State | A Digital Collection Celebrating the Founding of the Historically Black College and University (HBCU) |
| Multi-State | American Indians of the Pacific Northwest (University of Washington Libraries) |
| Multi-State | Columbia River Basin Ethnic History Archive |
| Multi-State | Digital Commons Collections |
| Multi-State | Digital Library of Appalachia |
| Multi-State | Digital Public Library of America |
| Multi-State | Documenting the American South |
| Multi-State | Library of Congress Digital Collections |
| Multi-State | Mountain West Digital Library |
| Multi-State | National Archives Online Exhibits |
| Multi-State | Northwest Digital Heritage |
| Multi-State | PastPerfectOnline Collections |
| Multi-State | Pioneering the Upper Midwest: Books from Michigan, Minnesota, and Wisconsin, ca. 1820-1910 |
| Multi-State | Plains to Peak Collective |
| Multi-State | Scandinavian Immigrant Experience Collection (Pacific Lutheran University) |
| Multi-State | Smithsonian Digital Library |
| Multi-State | Upper Mississippi Valley Digital Image Archive |
| Multi-State | Western Waters Digital Library |
| Alabama | Alabama Department of Archives and History |
| Alabama | Alabama Department of Archives and History Digital Collections |
| Alabama | Alabama Maps |
| Alabama | Alabama Mosaic |
| Alabama | Auburn University Digital Library |
| Alabama | Birmingham Public Library Digital Collections |
| Alabama | Encyclopedia of Alabama |
| Alabama | University of Alabama Special Collections |
| Alaska | Alaska Digital Archives |
| Alaska | Alaska State Library |
| Alaska | Alaska, Western Canada and United States Collection (University of Washington Libraries) |
| Alaska | SLED: Statewide Library Electronic Doorway |
| Arizona | Arizona Archives Online |
| Arizona | Arizona Memory Project |
| Arizona | Arizona State University Libraries Online Collections |
| Arizona | Digital Arizona Library |
| Arizona | Northern Arizona University – Colorado Plateau Digital Collections |
| Arizona | Through Our Parents’ Eyes: History & Culture of Southern Arizona |
| Arizona | University of Arizona Digital Collections |
| Arkansas | Arkansas Digital Archives |
| Arkansas | Arkansas State Library Digital Collections |
| Arkansas | Central Arkansas Library System Digital Collections |
| Arkansas | The Butler Center for Arkansas Studies/Arkansas Studies Institute |
| Arkansas | The Encyclopedia of Arkansas History & Culture |
| Arkansas | University of Arkansas Libraries Digital Collections |
| California | Anne T. Kent California Room (Marin County Free Library) |
| California | California Digital Archives |
| California | California Digital Library (CDL) |
| California | California Revealed |
| California | California State Library Online Resources |
| California | California State Library, San Francisco Sutro Library |
| California | Calisphere |
| California | Los Angeles Public Library, Collections and Resources |
| California | Online Archive of California |
| California | Sacramento History Online |
| California | San Fernando Valley History Digital Library |
| California | University of Southern California Digital Library |
| Colorado | Colorado Encyclopedia Digital Collections |
| Colorado | Colorado State Archives |
| Colorado | Colorado Virtual Library |
| Colorado | Denver Public Library Digital Collections |
| Colorado | History Colorado Archives |
| Connecticut | Connecticut Digital Archive |
| Connecticut | Connecticut History Illustrated |
| Connecticut | Connecticut History Online |
| Connecticut | Connecticut State Library Digital Collections |
| Connecticut | ConnecticutHistory.org |
| Connecticut | Yale University Digital Collections |
| Delaware | Delaware Collections Gateway |
| Delaware | Delaware Digital Archives |
| Delaware | Delaware Public Archives |
| Delaware | University of Delaware Digital Collections |
| Florida | Central Florida Memory Digital Collections |
| Florida | Florida Memory |
| Florida | Publication of Archival Library & Museum Materials (PALMM) |
| Florida | University of Florida Digital Collections |
| Florida | University of South Florida Digital Collections |
| Georgia | Digital Library of Georgia |
| Georgia | Georgia Historic Books |
| Georgia | Georgia State University Digital Collections |
| Georgia | Georgia’s Virtual Vault |
| Georgia | The New Georgia Encyclopedia |
| Georgia | University of Georgia Digital Collections |
| Hawaii | Hawaii State Archives Digital Collections |
| Hawaii | Ulukau Hawaii Electronic Library |
| Hawaii | University of Hawaii at Manoa Digital Collections |
| Hawaii | University of Hawaii eVols Digital Repository |
| Idaho | Digital Atlas of Idaho |
| Idaho | Digital Collections from the Idaho State Archives and Research Center. |
| Idaho | Idaho State Archives |
| Idaho | Idaho State Archives Digital Collections |
| Idaho | Idaho State Historical Society |
| Idaho | Stacks, The Idaho Digital Repository |
| Idaho | University of Idaho Special Collections & Archives |
| Illinois | Chicago Public Library Digital Collections |
| Illinois | Encyclopedia of Chicago |
| Illinois | Homicide in Chicago 1870-1930 (Northwestern University) |
| Illinois | Illinois Digital Archives |
| Illinois | Illinois Periodicals Online |
| Illinois | Illinois State Archives Databases |
| Illinois | Northern Illinois University Digital Library |
| Indiana | Allen County Public Library Genealogy Center |
| Indiana | Ball State University Digital Media Repository |
| Indiana | Indiana Digital Archives |
| Indiana | Indiana Historical Society – Digital Image Collections |
| Indiana | Indiana Hosted Digital Collections |
| Indiana | Indiana Memory |
| Indiana | Indiana State Library, Collections |
| Indiana | Indiana University Digital Collections |
| Iowa | Iowa Digital Library |
| Iowa | Iowa Heritage Digital Collections |
| Iowa | Iowa State Historical Society Digital Archives |
| Iowa | Iowa State University Digital Collections |
| Kansas | Kansas Historical Society State Archives |
| Kansas | Kansas Memory |
| Kansas | Kansas University Digital Collections |
| Kansas | The Kansas Collection |
| Kentucky | ExploreUK |
| Kentucky | Kentucky Digital Library |
| Kentucky | Kentucky Historical Society |
| Kentucky | Kentucky State Digital Archives |
| Louisiana | Historic New Orleans Collection |
| Louisiana | LDMA (Louisiana Digital Media Archive) |
| Louisiana | Louisiana Digital Library |
| Louisiana | LSU Digital Collections |
| Louisiana | Resources for Research in New Orleans |
| Louisiana | Tulane University Digital Library |
| Maine | Digital Maine Repository |
| Maine | Maine Historical Society |
| Maine | Maine Memory Network |
| Maine | University of Maine Special Collections |
| Maryland | Archives of Maryland Online |
| Maryland | Digital Maryland |
| Maryland | Maryland Center for History and Culture |
| Maryland | Maryland State Archives |
| Maryland | Maryland State Archives Online Exhibits |
| Maryland | WHILBR: Western Maryland’s Historical Library |
| Massachusetts | American Centuries…view from New England |
| Massachusetts | Boston College Digitized Collections |
| Massachusetts | Digital Commonwealth |
| Massachusetts | Massachusetts Archives – Digital Records |
| Massachusetts | Massachusetts Historical Society – Digital Collections |
| Massachusetts | Massachusetts Libraries – Digital Collections |
| Michigan | Archives of Michigan |
| Michigan | Michigan County Histories and Atlases |
| Michigan | Michiganology |
| Michigan | The Making of Ann Arbor |
| Michigan | The Making of Modern Michigan |
| Michigan | University of Michigan Bentley Historical Library |
| Michigan | Virtual Motor City |
| Minnesota | Iron Range Research Center |
| Minnesota | Minnesota Digital Library |
| Minnesota | Minnesota Historical Society |
| Minnesota | Minnesota People Records |
| Minnesota | MNopedia |
| Minnesota | University of Minnesota Digital Conservancy |
| Mississippi | Mississippi Department of Archives and History Collections |
| Mississippi | Mississippi Digital Archives |
| Mississippi | Mississippi Digital Library |
| Mississippi | Mississippi History Resources |
| Mississippi | University of Southern Mississippi Digital Collections |
| Missouri | Midwest Genealogy Center |
| Missouri | Missouri Digital Heritage |
| Missouri | Missouri State Archives |
| Missouri | Missouri Valley Special Collections |
| Missouri | Missouriana Digital Text Collection |
| Missouri | University of Missouri Digital Library |
| Montana | Montana Historical Society Online Collections |
| Montana | Montana Memory Project |
| Nebraska | History Nebraska |
| Nebraska | Nebraska Memories |
| Nebraska | Nebraska Western Trails |
| Nevada | Nevada Cooperative Libraries Automated Network Digital Collections |
| Nevada | ONE-Online Nevada Encyclopedia |
| Nevada | University of Nevada, Las Vegas Digital Collections |
| Nevada | University of Nevada, Reno Digital Archive |
| New Hampshire | New Hampshire Archives |
| New Hampshire | New Hampshire History Network |
| New Hampshire | University of New Hampshire Library – Internet Archive |
| New Hampshire | University of New Hampshire Library Digital Collections |
| New Jersey | New Jersey Digital Highway |
| New Jersey | New Jersey State Archives Collections |
| New Jersey | New Jersey State Library Digital Collections |
| New Jersey | Princeton University Library – Digital Collections and Initiatives |
| New Jersey | The Rutgers Oral History Archives |
| New Jersey | West Jersey History Project |
| New Mexico | New Mexico Archives Online |
| New Mexico | New Mexico Digital Collections |
| New Mexico | New Mexico History State Records Center & Archives |
| New Mexico | New Mexico State Library Digital Collections |
| New Mexico | University of New Mexico Digital Repository |
| New York | Digital Culture of Metropolitan New York |
| New York | Hudson River Valley Heritage |
| New York | New York Heritage Digital Collections |
| New York | New York Public Library Digital Collections |
| New York | New York Public Library Digital Projects |
| New York | New York State Archives Digital Collections |
| New York | New York State Historical Literature (Cornell) |
| New York | New York State Library Collections |
| New York | Syracuse University Library Digital Collections |
| New York | U.S. Military Academy Digital Collection |
| North Carolina | Davidson College Digital Collections |
| North Carolina | Digital Durham |
| North Carolina | DigitalNC – Digital Heritage Center |
| North Carolina | East Carolina University Digital Collections |
| North Carolina | NCpedia |
| North Carolina | North Carolina Digital Collections |
| North Carolina | North Carolina State Archives |
| North Carolina | University of North Carolina Digital Collections |
| North Dakota | Digital Horizons |
| North Dakota | North Dakota State Archives |
| North Dakota | North Dakota State University Digital Collections |
| North Dakota | State Historical Society of North Dakota |
| Ohio | Akron-Summit County Public Library Archival Collections |
| Ohio | Cleveland Public Library Digital Gallery |
| Ohio | Greater Cincinnati Memory Project |
| Ohio | Ohio History Central |
| Ohio | Ohio Memory |
| Ohio | State Library of Ohio Collections |
| Ohio | The Cleveland Memory Project |
| Ohio | The Digital Shoebox Project: Historical Treasures of Southeastern Ohio |
| Ohio | The Encyclopedia of Cleveland History |
| Oklahoma | Encyclopedia of Oklahoma History and Culture |
| Oklahoma | Oklahoma Digital Prairie |
| Oklahoma | Oklahoma Historical Society |
| Oklahoma | Oklahoma State Archives |
| Oklahoma | The Gateway to Oklahoma History |
| Oklahoma | University of Oklahoma Western History Collections |
| Oregon | Oregon Blue Book |
| Oregon | Oregon Digital |
| Oregon | Oregon History Project |
| Oregon | Oregon Multicultural Archives |
| Oregon | Oregon State Archives |
| Oregon | Salem Online History |
| Oregon | Southern Oregon Digital Archives |
| Oregon | State Library of Oregon Digital Collections |
| Oregon | The Oregon Encyclopedia |
| Pennsylvania | Archives Records Information Access System (Pennsylvania State Archives) |
| Pennsylvania | Chronicles: The Annals of Dickinson College |
| Pennsylvania | Digital Collections at the State Library of Pennsylvania |
| Pennsylvania | Historic Pittsburgh |
| Pennsylvania | Historical Society of Pennsylvania Digital Library |
| Pennsylvania | Penn in the Age of Franklin, 1740-1790 |
| Pennsylvania | Pennsylvania State Archives |
| Pennsylvania | PhillyHistory.org |
| Pennsylvania | POWER Library: Pennsylvania’s Electronic Library |
| Rhode Island | Brown University Library Collections |
| Rhode Island | Providence Public Library Digital Collections |
| Rhode Island | Rhode Island State Digital Archives |
| South Carolina | Lowcountry Digital Library |
| South Carolina | SCIWAY |
| South Carolina | South Carolina Department of Archives and History Digital Collections |
| South Carolina | South Carolina Department of Archives and History, Archives |
| South Carolina | South Carolina Digital Library |
| South Carolina | South Carolina Encyclopedia |
| South Carolina | University of South Carolina Digital Collections |
| South Dakota | Digital Library of South Dakota |
| South Dakota | South Dakota Digital Archives |
| South Dakota | South Dakota State Historical Society |
| Tennessee | Archives of Appalachia |
| Tennessee | Digital Library of Tennessee |
| Tennessee | Great Smoky Mountains Regional Project |
| Tennessee | Tennessee Virtual Archive |
| Tennessee | The Tennessee Encyclopedia of History & Culture |
| Tennessee | Volunteer Voices |
| Texas | East Texas Digital Archives |
| Texas | Preservation Houston: Museum of Houston |
| Texas | Texas State Library and Archives Commission |
| Texas | The Handbook of Texas Online |
| Texas | The Portal to Texas History |
| Utah | BYU Library Digital Collections |
| Utah | University of Utah Digital Collections |
| Utah | Utah Division of State History Digital Collections |
| Utah | Utah History Encyclopedia |
| Utah | Utah State Digital Archives |
| Utah | Utah State University Digital History Collections |
| Utah | Utah’s Online Library |
| Vermont | Middlebury College Digital Collections |
| Vermont | University of Vermont Libraries Digital Collections |
| Vermont | Vermont Folklife Center |
| Vermont | Vermont Historical Society |
| Virginia | Encyclopedia Virginia |
| Virginia | Old Dominion University Libraries Digital Collections |
| Virginia | The Library of Virginia |
| Virginia | Virginia Commonwealth University Digital Collections |
| Virginia | Virginia Memory |
| Virginia | Virginia Tech Image Base |
| Virginia | Virtual Jamestown |
| Virginia | VMI Digital Collections |
| Washington | Central Washington University Archives and Special Collections |
| Washington | Digital Collections (Everett Public Library) |
| Washington | HistoryLink.org: The Online Encyclopedia of Washington State History |
| Washington | University of Washington Libraries Digital Collections |
| Washington | Washington State Archives – Digital Archives |
| Washington | Washington State Library Digital Collections and Resources |
| Washington | Washington State University Libraries Digital Collections |
| West Virginia | e-WV: The West Virginia Encyclopedia |
| West Virginia | West Virginia Division of Culture and History |
| West Virginia | West Virginia University Libraries Digital Collections |
| Wisconsin | Dictionary of Wisconsin History |
| Wisconsin | Digital Collections (University of Wisconsin, Milwaukee Libraries) |
| Wisconsin | Online Collections at the Wisconsin Historical Society |
| Wisconsin | Recollection Wisconsin |
| Wisconsin | The State of Wisconsin Collection |
| Wisconsin | University of Wisconsin Digital Collections |
| Wisconsin | Wisconsin Electronic Reader |
| Wisconsin | Wisconsin Local History and Biography Articles |
| Wisconsin | Wisconsin Pioneer Experience |
| Wyoming | University of Wyoming Libraries–Digital Collections |
| Wyoming | Wyoming State Archives Digital Collections |
| Wyoming | Wyoming State Library Digital Collection Suite |
