Ronald Kidd (11 July 1889 – 13 May 1942) was a civil rights campaigner.
Born in London, England, the son of surgeon Leonard Joseph Kidd, grandson of doctor Joseph Kidd, and nephew of doctors Percy Kidd and Walter Aubrey Kidd, Ronald Hubert Kidd had a variety of jobs before finding his vocation as a campaigner against injustices in 1930s and 1940s Britain.
In 1934, angered by Police responses to hunger marchers, he founded the Council for Civil Liberty (later the National Council for Civil Liberty, or NCCL, now known as Liberty), which included such figures as E. M. Forster as its President and Clement Attlee, Aneurin Bevan, Havelock Ellis, Aldous Huxley, J. B. Priestley, Bertrand Russell, and H. G. Wells among its vice-presidents.