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- Haggard, H. Rider. H. Rider Haggard Papers. Rare Book & Manuscript Library. Columbia University.
- Hambly, Barbara. Barbara Hambly papers. Special Collections & University Archives, Tomás Rivera Library, University of California, Riverside.
- Hamilton, Edmond. Edmond Hamilton Papers. Special Collections. Eastern New Mexico University. Please contact curator for information on unprocessed materials.
- Harness, Charles L. Charles L. Harness Papers. Special Collections. University of Maryland, Baltimore County.
- Harness, Jack. Jack Harness papers. Special Collections & University Archives, Tomás Rivera Library, University of California, Riverside.
- Harris, Charlaine. Charlaine Harris Collection. Department of Archives and Special Collections. University of Mississippi.
- Harris, Vivian Beynon. Vivian Beynon Harris archive. University of Liverpool. Special Collections and Archives.
- Harrison, Harry.
- Hartwell, David. Manuscript Collection. Merril Collection of Science Fiction, Speculation and Fantasy. Toronto Public Library.
- Haskell, Merrie. Merrie Haskell Papers. SFWA Collection, Rare Books and Special Collections, Northern Illinois University.
- Heinlein, Robert A.
- Herbert, Frank. Frank Herbert Archives. University Archives & Special Collections. California State University, Fullerton.
- Hines, Jim C. Jim C. Hines Papers. SFWA Collection, Rare Books and Special Collections, Northern Illinois University. Please contact curator for information on unprocessed materials.
- Hoban, Lillian. Lillian Hoban Papers. GEN MSS 1199. Beinecke Rare Book and Manuscript Library. Yale University.
- Hoban, Russell.
- Hodgson, William Hope. Hodgson (William Hope) papers. Special Collections & University Archives, Tomás Rivera Library, University of California, Riverside.
- Holly, Joan Hunter. Joan Hunter Holly Papers. MS 252. Kenneth Spencer Research Library, University of Kansas.
- Hopkinson, Nalo. Hopkinson (Nalo) papers. MS 386. Special Collections & University Archives, Tomás Rivera Library, University of California, Riverside.
- Howard, (John) Hayden. Hayden Howard Papers. SFWA Collection, Rare Books and Special Collections, Northern Illinois University. Please contact curator for information on unprocessed materials.
- Howard, Kat. Kat Howard Papers. SFWA Collection, Rare Books and Special Collections, Northern Illinois University.
- Howard, Robert E.
- Howard, Stephen. Stephen Howard collection on Star Trek. Special Collections & University Archives, Tomás Rivera Library. University of California, Riverside.
- Hughes, Marion. Manuscript Collection. Merril Collection of Science Fiction, Speculation and Fantasy. Toronto Public Library.
- Hulick, Douglas. Douglas Hulick Papers. SFWA Collection, Rare Books and Special Collections, Northern Illinois University.
- Hunter, Faith. Faith Hunter Collection. Cushing Memorial Library & Archives. Texas A&M University.
- Hurley, Kameron. Kameron Hurley Papers. SFWA Collection, Rare Books and Special Collections, Northern Illinois University. Please contact curator for information on unprocessed materials.
- Hutcheson, Don. Manuscript Collection. Merril Collection of Science Fiction, Speculation and Fantasy. Toronto Public Library.