- Thomas L. Williams collection1,599
- O.W. Riegel Papers1,193
- Siler Family Papers1,147
- A. Willis Robertson Papers1,054
- Long/Trail Southeastern West Virginia Historical Records693
- United Mine Workers of America, Health and Retirement Funds, Records552
- Director's Correspondence (RG-01)549
- West Virginia University, President's Office, Records538
- Philip S. Hench Walter Reed Yellow Fever collection506
- Robert and Wilva Breen papers451
- Francis J. McNamara papers444
- Gregory A. Prince Mormon Studies Collection437
- Harley Martin Kilgore (1893-1956), Senator, Papers428
- American Public Transportation Association records337
- Carl A. "Pappy" Fehr papers313