HMS Medway (P223) is a Batch 2 River-class offshore patrol vessel for the British Royal Navy. Named after the River Medway in Kent, she was the second Batch 2 River-class vessel to be commissioned.

On 6 November 2013 it was announced that the Royal Navy had signed an Agreement in Principle to build three new offshore patrol vessels, based on the River-class design, at a fixed price of £348 million including spares and support. In August 2014, BAE Systems signed the contract to build the ships on the Clyde in Scotland. The Ministry of Defence stated that the Batch 2 ships are capable of being used for constabulary duties such as "counter-terrorism, counter-piracy and anti-smuggling operations".

According to BAE Systems, the vessels are designed to deploy globally, conducting anti-piracy, counter-terrorism and anti-smuggling tasks currently conducted by frigates and destroyers.

HMS Medway was commissioned on Thursday 19 September 2019 at the former Royal Navy Chatham Dockyard in Kent and is sponsored by Lady Fallon, the wife of former Defence Secretary Sir Michael Fallon.