Castle Hill Publishers (CHP) is a publisher of Holocaust denial literature, set up in 1998 by the convicted German Holocaust denier, Germar Rudolf. In 2014, it merged with the American Holocaust denial organisation, CODOH (Committee for Open Debate on the Holocaust).

In 2022, CHP was sold to CODOH after shipping books from the UK to Europe became “financially and legally untenable” because of Brexit. It publishes the Holocaust Handbook series which includes over 50 books by some of the most high profile deniers in the world. In the same year, founder Germar Rudolf stepped back from both CODOH and Castle Hill. A cryptic message on its website suggests that Rudolf’s decision was motivated by “them” — AKA Jews — attacking him, but makes no mention of whether his 2020 conviction for exposing his genitals in a children’s playground, while holding a bottle of baby oil, had anything to do with his decision to step back from running the Holocaust denial enterprise.

In 2022, Castle Hill moved to the US and in late 2023 it collapsed. Many of its books are now sold by ARMREG Ltd, London. However, CODOH continues to operate.