The Royal Army Medical Corps (RAMC) was a specialist corps in the British Army which provided medical services to all Army personnel and their families, in war and in peace.

On 15 November 2024, the corps was amalgamated with the Royal Army Dental Corps and Queen Alexandra's Royal Army Nursing Corps to form the Royal Army Medical Service.

Medical services in the British armed services date from the formation of the Standing Regular Army after the Restoration of Charles II in 1660. Prior to this, from as early as the 13th century there are records of surgeons and physicians being appointed by the English army to attend in times of war; but this was the first time a career was provided for a Medical Officer (MO), both in peacetime and in war. For much of the next two hundred years, army medical provision was mostly arranged on a regimental basis, with each battalion arranging its own hospital facilities and medical supplies. An element of oversight was provided by the appointment of three officials: a Surgeon-general, a Physician-general and an Apothecary-general.

In 1793 an Army Medical Board was formed (consisting of the Surgeon-general, Physician-general and Inspector of Regimental Infirmaries), which promoted a more centralised approach drawing on concurrent civilian healthcare practices. The Board set up five General (as opposed to regimental) Military Hospitals: four in the naval ports of Chatham, Deal, Plymouth and Gosport (Portsmouth), and one (known as York Hospital) in Chelsea. These hospitals received large numbers of sick and injured soldiers from the French Revolutionary Wars (so much so that by 1799 additional General Military Hospitals were set up in Yarmouth, Harwich and Colchester Barracks); the Board, however, was criticised, for both high expenditure and poor management. By the end of the century the Board had been disestablished, and most of the General Hospitals were closed or repurposed not long afterwards. By 1807 the only General Hospitals in operation were York Hospital (which was close to the Royal Hospital, Chelsea, where invalided soldiers were routinely sent for pension assessment) and the hospital at Parkhurst (which was attached to the army's Invalid Depôt on the Isle of Wight, where soldiers invalided home from service overseas were initially sent).

In 1810 the offices of Surgeon-general and Physician-general were abolished and a new Army Medical Department was established, overseen by a board chaired by a Director-General of the Medical Department. James McGrigor served in this role from 1815 to 1851: McGrigor, who has been called the Father of Army Medicine, had served as principal medical officer under the Duke of Wellington during the Peninsular War. During that time he had introduced significant changes in the organisation of the army's medical services, placing them on a far more formal footing: together with George Guthrie, he instituted the use of dedicated ambulance wagons to transport the wounded, and set up a series of temporary hospitals (formed of prefabricated huts brought over from Britain) to aid the evacuation of wounded soldiers from the front line.

After the end of the Peninsular War Fort Pitt in Chatham became the de facto headquarters of the Army Medical Department (the Invalid Depôt having relocated to Chatham from the Isle of Wight). A General Military Hospital was established on the site, which took on many of the functions (and most of the patients) of the old York Hospital. The influence of the Director-General grew, and from 1833 he was given sole charge of the department. That same year the (hitherto separate) Irish Medical Board was merged into the department, as was the Ordnance Medical Department twenty years later.

The Crimean War, however, would lay bare the inadequacies of the Army Medical Department (and many others). In 1854 there were only 163 surgeons on the Department's books; the Army had just two ambulance wagons, both of which were left behind in Bulgaria, and it relied for stretcher bearers on the Hospital Conveyance Corps (which was made up of pensioners and others deemed too infirm to fight). Two base hospitals were set up in Scutari, more than 300 miles from the front. Within weeks of arriving, more than half the British force had been incapacitated by disease (mainly typhus, dysentery and cholera); and in the space of seven months some 10,000 British servicemen out of a total of 28,000 had died.

In June 1855 a Medical Staff Corps was established (in place of the Hospital Conveyance Corps, which had by then been merged into the Land Transport Corps). It was formed of nine companies, overseen by a single officer, and had its headquarters at Fort Pitt. The Medical Staff Corps was set up to provide orderlies and stretcher bearers (later it was renamed the Army Hospital Corps, but reverted to its original title in 1884). The officers known as purveyors, who were responsible for medical provisioning, were formed into a separate Purveyors' Department by a Royal Warrant of 1861; nine years later it was merged into the Control Department, and later became part of the Army Service Corps. In 1857, in response to the Crimean debacle, a Royal Commission had been appointed for the improvement of sanitary conditions in Army barracks and hospitals; it recommended (among other things) the establishment of an Army Medical School, which was set up in 1860 at Fort Pitt Hospital before moving in 1863 to the new Royal Victoria Military Hospital at Netley outside Southampton.