Pat Arrowsmith (born March 2, 1930) is a British author and peace campaigner.
Arrowsmith was educated at Cheltenham Ladies College, read history at the University of Cambridge, and then read Social Science at the University of Liverpool and at Ohio University as a US-UK Fulbright Scholar. She is a co-founder of the Campaign for Nuclear Disarmament.
She has served eleven prison sentences for her political activities. In 1961 she was the subject of parliamentary questions after she was force-fed while on hunger strike in Gateside prison.