- Annie C.
- Café Critique
- George Caffentzis
- Luzenir Caixeta
- Teresa Caldas
- Paul Calm
- Guido Calogero
- Dom Hélder Câmara
- Max Campa
- Peter Campa
- Albert Camus
- Gustav Canaval
- Elias Canetti
- Aldo Capitini
- Bernd Carell
- Antonio Carlo
- Igor A. Caruso
- Emílio de Carvalho
- Otelo Saraiva de Carvalho
- Dorothée Casalis
- George Casalis
- Nina Cassian
- Corrado Castelli
- Luciana Castellina
- Eduard Castle
- Cornelius Castoriadis
- Fidel Castro
- Camillo Cattani
- Cattiva
- Paul Celan
- Georg Chaimowicz
- Günther Chaloupek
- Erwin Chargaff
- François Charlier
- Jannis Chasoglou
- Nikos Chilas
- Chile-Solidaritätsfront
- Pronto Chiparla
- Manfred Chobot
- Frank Chodorov
- Noam Chomsky
- Christoph Chorherr
- Ernst Chorherr
- Silke Chorus
- Richard Christ
- Nikita Chruschtschow
- Cia
- Antonia Cicero
- Raphael Cilia
- AktivistInnen des Clandestina Network
- Kenneth Clark
- Ramsey Clark
- Claudia
- Claudia & Mutter
- Jürgen Claus
- Harry Cleaver
- Manfred Clemenz
- Club Habitat
- Alexander Cockburn
- Annie Cohen
- Laurie Cohen
- Leonardo Cohen
- Sara Cohen Shabot
- Daniel Cohn-Bendit
- Carsten Colpe
- Yves Congar
- Constant
- Michel Contat
- Context XXI – Verein für Kommunikation und Information
- Mike Cooley
- Coordinamento per lo sciopero del lavoro migrante in Italia
- Gena Corea
- Giancarlo Cornuto
- Victoria Corpuz
- Yakup Coşar
- Barbara Coudenhove-Kalergi
- Richard Coudenhove-Kalergi
- Margaret Coulson
- Harvey Cox
- Alexander Craig
- Meinhard Creydt
- Birgit von Criegern
- Brana Crnčević
- Jan-Hendrik Cropp
- Anthony Crosland
- Dick Crossman
- Ludwig Csépai
- Fritz Csoklich
- Franz Theodor Csokor
- Peter Csulak
- Walter von Cube
- Slave Cubela
- Christian Cwik
- Hermann Czech
- Herwig Czech
- Hermann Czekal
- Hans Czermak
- Karl Czernetz
- Hubertus Czernin
- Wilhelm F. Czerny
- Fritz Czerwenka
- Eva Czjzek
- Elfriede Czurda
AutorInnen
