Sir Ralph Freeman (fl. 1610–1655) was a wealthy English civil judge, also known as a dramatist and translator. He should not be confused with another contemporary Sir Ralph Freeman who was lord mayor of London, and died on 16 March 1634.
He succeeded Robert Naunton in his office of as one of six Masters of Requests in 1618. He had married a relation of George Villiers, 1st Duke of Buckingham, through whose influence he had also obtained a grant of [the rights of] pre-emption and transportation of tin for seven years in August 1613.
In 1622 he had a grant in reversion of the auditorship of imprests and of the auditorship of the Mint. Freeman hoped that through Lord Buckingham, he would succeed Thomas Murray as provost of Eton, but the appointment was given to Sir Henry Wotton. Freeman then unsuccessfully applied to Buckingham to be allowed to succeed Wotton as ambassador at Venice.
In 1626 and 1627 he was on a commission for the arrest of French ships and goods in England. In 1629 he held the office of auditor of imprests after a dispute as to its possession with Sir Giles Monpesson and purchased a large manor in Betchworth, Surrey for £1,080.
He became master worker of the mint at a salary of £500 per annum, when in 1635, jointly with Sir Thomas Aylesbury, he formed a commission exercising the powers of the Master of the Mint. This came about by the exclusion from the position of Robert Harley, in favour of the previous incumbent Randal Cranfield, who then died suddenly. Freeman was also one of the first appointed in February 1635 to the newly created office of 'searcher and sealer' of all foreign hops imported into England.