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- PJ Haarsma (born 1964)
- Karen Haber (born 1955)
- H. Rider Haggard (1856 – 1925)
- Ronald M. Hahn (born 1948)
- Jack C. Haldeman II (1941 – 2002)
- Joe Haldeman (born 1943)
- Barbara Hambly (born 1951)
- Edmond Hamilton (1904 – 77)
- Peter F. Hamilton (born 1960)
- Elizabeth Hand (born 1957)
- Lee Harding (born 1937)
- Charles L. Harness (1915 – 2005)
- Tara K. Harper (born 1961)
- Clare Winger Harris (1891 – 1968)
- Harry Harrison (1925 - 2012)
- M. John Harrison (born 1945)
- Henry Hasse (1913 – 77)
- Simon Hawke (born 1951)
- Peter Heck
- Robert A. Heinlein (1907 - 88)
- Zenna Henderson (1917 – 83)
- Brian Herbert (born 1947)
- Frank Herbert (1920 – 86), Dune
- Philip E. High (1914 – 2006)
- Douglas Hill (born 1935)
- Ernest Hill (born 1914)
- Christopher Hinz (born 1951)
- Morioka Hiroyuki (born 1962) (in Japanese 森岡浩之)
- P. C. Hodgell (born 1951)
- William Hope Hodgson (1877 – 1918)
- E. T. A. Hoffman (1776 – 1822)
- Lee Hoffman (born 1932)
- H. H. Hollis (1921 – 77) (pseudonym of Ben Neal Ramey)
- James P. Hogan (1941 – 2010)
- Elizabeth Holden (born 1943)
- Robert Holdstock (1948 – 2009)
- Nalo Hopkinson (born 1960)
- Shinichi Hoshi (1926 – 97)
- Fred Hoyle (1915 – 2001)
- L. Ron Hubbard (1911 – 86)
- Marek Huberath (born 1954)
- Matt Hughes (born 1949)
- Monica Hughes (1925 – 2003)
- Cyril Hume (1900 - 66) Forbidden Planet
- Stephen Hunt (born 1966)
- Aldous Huxley (1894 – 1963)
Read more about this topic: List Of Science Fiction Authors