Robert Murray (1635 – 1725?) was an English financier, writer on commerce, and Whig conspirator. He is now remembered for his part in the first London Penny Post.
Born in the Strand, London, he was son of Robert Murray, a tailor. In 1649 he was entered as an apprentice in the books of the Clothworkers' Company, and took up his freedom in 1660. He is subsequently spoken of as "milliner" and "uphosterer" but may have retired from trade when he was writing.
It has been argued that the Penny Post's launch at the period of the exclusion crisis was no coincidence. It was announced on 22 March 1679 in the Mercurius Civicus, a Whig paper. It has been claimed that the opposition leader Lord Shaftesbury was a backer of the scheme, as he was of the paper.
Murray with William Dockwra opened for business with a penny post service on 27 March 1680. They offered to take letters "to any part of the City, or Suburbs", for a penny. Hugh Chamberlen and perhaps Henry Neville Payne were partners. The scheme was initially denounced by Titus Oates, because Payne who claimed a share in the concept was a Tory. But it was in fact taken up swiftly as a channel for distribution of anti-government writings. Coffee houses were used to pick up and drop posts.
Murray very shortly got into trouble connected with his support for the Duke of Monmouth. He then worked as an agent for Shaftesbury, and went to ground. He assigned his interest in the postal scheme to Dockwra; but later it was adjudged to pertain to James, Duke of York, as a branch of the general post office, by the King's Bench. Henry Bennet, 1st Earl of Arlington was brought in to run it in 1682, at the point when Shaftesbury went into self-imposed exile. The business itself thrived for a period.