Robert James "Bob" Heffron (10 September 1890 – 27 July 1978), also known as R. J. Heffron, was a long-serving New South Wales politician, union organiser and Australian Labor Party Premier of New South Wales from 1959 to 1964. Born in New Zealand, Heffron became involved in various Socialist and Labor movements in New Zealand and later Australia before joining the Australian Labor Party.