John Francis Donaldson, Baron Donaldson of Lymington, PC, QC (6 October 1920 – 31 August 2005) was a senior British judge who served as Master of the Rolls for ten years, from 1982-92. He is best known in some circles for his role as presiding judge in the infamous Guildford Four miscarriage of justice, especially his closing remarks where he regretted his inability to hang those wrongly convicted.
Donaldson attended first Charterhouse and then Trinity College, Cambridge. He served as chairman of the Federation of University Conservative and Unionist Associations, and harboured ambitions of becoming a Conservative Party Member of Parliament. He was an Independent Ratepayers Councillor for the County Borough of Croydon from 1949-53.
Husband of Mary Donaldson, Baroness Donaldson of Lymington.