Sir Thomas Bryan KS KB (died 14 August 1500) was a British justice of obscure origin.
Baker (Oxford Dictionary of National Biography) that he descended from a John Bryan, fishmonger of London, whose son, also John (d. 1418), owned land in Buckinghamshire & London, as did Sir Thomas.
He was at this point serving as legal counsel for various London companies, including as a steward for St Bartholomew's Hospital in 1459.
After the accession of Edward IV in 1471 Bryan was made Chief Justice of the Common Pleas, and was appointed a Knight of the Bath in 1475.
Bryan served as Chief Justice for 29 years until his death, the longest period of service up to that point.