AJP or ajp may refer to:
* ''American Journal of Philology'', published by Johns Hopkins University Press
* ''American Journal of Psychiatry'', published by the American Psychiatric Association
* ''American Journal of Psychology'', published by the University of Illinois Press
* ''American Journal of Physics'', published by the American Association of Physics Teachers and the American Institute of Physics
* ''American Journal of Physiology'', published by the American Physiological Society
* Asian Jake Paul, single by American Youtuber IDubbbz
* ''Australasian Journal of Philosophy'', published by the Australasian Association of Philosophy
* AJP Motos, a Portuguese motorcycle brand
* Animal Justice Party, a political party in Australia focusing on animal rights
* Apache JServ Protocol, protocol for computer servers
* All Japan Pro Wrestling, Japanese professional wrestling promotion
* South Levantine Arabic (deprecated ISO 639-3 code)
* TVR Speed Eight engine, AJP6 and AJP8, TVR engines
* Assam Jatiya Parishad, political party in India
{{disambiguation