Institutions represented through individuals' memberships:
- Ashland University
- Athenaeum of Ohio
- Baldwin Wallace College
- Belmont Technical College
- Bluffton University
- Bowling Green State University
- Capital University
- Case Western Reserve University
- Cedarville University
- Cincinnati State Technical and Community College
- Cleveland Marshall College of Law
- Cleveland State University
- College of Wooster
- Columbus State Community College
- Cuyahoga Community College
- David N. Myers College
- Denison University
- Devry Institute of Technology
- Edison State Community College
- Franciscan University of Steubenville
- Franklin University
- Heidelberg College
- Hiram College
- Hocking College
- Jefferson Community College
- John Carroll University
- Kent State University
- Kenyon College
- Kettering College of Medical Arts
- Malone College
- Medical University of Ohio
- Methodist Theological School in Ohio
- Miami University
- Mideastern Ohio Regional Library Organization
- Mount Carmel College of Nursing
- Mount Union College
- Mount Vernon Nazarene College
- Muskingum College
- Northwest State Community College
- Oberlin College
- OCLC, Inc.
- Ohio College Association
- Ohio Dominican University
- Ohio Northern University
- Ohio State University
- Ohio State University Agricultural Technical Institute
- Ohio University
- Ohio Wesleyan
- OhioLINK
- OhioNET
- Otterbein College
- Owens Community College
- Pontifical College Josephinum
- Shawnee State University
- Sinclair Community College
- Southern State Community College
- State Library of Ohio
- Tiffin University
- University of Akron
- University Of Cincinnati
- University of Dayton
- University of Toledo
- Ursuline College
- Wilberforce University
- Wilmington College
- Wittenburg University
- Wright State University
- Youngstown State University