- Historical Archives of the Hungarian State Security1
- Holliday, George D.1
- Hoxha, Enver1
- Hungarian Institute for Public Opinion Research1
- Huszadik Század Hangja Kutatóműhely1
- IArots'kyi, Petro Lavrentiiovych1
- Index on Censorship1
- Information Services Department1
- International Commission of Jurists (1952- )1
- International Helsinki Federation for Human Rights1
- Jakštas, Juozas1
- Janics, Kálmán1
- Jassó, Mária1
- Jeles, András1
- Jesi, Furio1
- Judit, Miklósy1
- Jurga, Tadeusz1
- Kantautas, Adam1
- Kantorovich, Boris IAkovlevich1
- Katz, Ephraim1