Coordinates: 51°07′21″N 2°43′39″W / 51.1225°N 2.7275°W / 51.1225; -2.7275

Millfield is an independent co-educational school in Street in Somerset, in south-west England.

The school currently has a roll of 1,200 pupils, of whom 935 are boarders. The school's selection criteria are non-academic and the school offers a number of academic and sports scholarships, along with a number of bursaries. A charity, the Millfield Foundation, has been set up to raise funds to fund scholarships and bursaries - this is seen as being important to maintain the 'Millfield mix' - an important part of the school's life and ethos, where pupils of all backgrounds benefit from being at school together. The school is a member of the G20 Schools Group.

Millfield School has its own Preparatory school - Millfield Preparatory School at Edgarley Hall, situated in nearby Glastonbury.

Millfield was founded in 1935 by RJO Meyer (always affectionately referred to at Millfield just as "Boss") in the mansion originally owned by the Clark family, who owned and ran the major shoe manufacturer Clarks. In 1939 the school became one of the first independent schools to be co-educational. Over the years the school acquired land and houses around the locale, and a result there were many boarding houses within a 10-mile (16-kilometre) radius of the original site. In recent years, several new boarding houses have been built on the school campus, replacing those situated off-campus.