The National Institute for Medical Research (NIMR), was a medical research institute based in Mill Hill, on the outskirts of north London, England. It was funded by the Medical Research Council (MRC);

Mill Hill is a suburb in the London Borough of Barnet, England. It is situated around 10 miles (16 km) northwest of Charing Cross. It was in the historic county of Middlesex until 1965, when it became part of Greater London. Its population was 18,451 in 2011.