Barts and The London School of Medicine and Dentistry, commonly known as Barts, is a medical and dental school in London, England. The school is part of Queen Mary University of London, a constituent college of the federal University of London, and a member of the United Hospitals. It was formed in 1995 by the merger of the London Hospital Medical College (the first school to be granted an official charter for medical teaching in 1785) and St Bartholomew's Hospital Medical College (the oldest remaining hospital in the United Kingdom, having been founded in 1123, with medical teaching beginning from that date).

The school exists on two main sites, having a presence at the site of both of the former colleges at and near their respective hospitals, St Bartholomew's Hospital (in Smithfield in the City of London and nearby in Charterhouse Square), and the Royal London Hospital in Whitechapel with an additional site at Queen Mary's main (Mile End) campus.

As of 2018, the school had 2,235 undergraduate and 1,175 postgraduate students, for a total of 3,410 students.