New Inn Hall was one of the earliest medieval Halls of the University of Oxford. It was located in New Inn Hall Street, Oxford.
The original building on the site was Trellick's Inn for students, which passed on the death in 1360 of its founder Bishop John Trilleck, Bishop of Hereford to William of Wykeham, Bishop of Winchester, and from him to New College in 1392.
After being used by Cistercian students for some years from about 1400 to 1420, the hall was entirely rebuilt shortly before 1476 and renamed the New Inn.
As the Inns developed into teaching establishments, New Inn Hall became noted for its jurists such as Alberico Gentili, Regius Professor of Civil Law, Sir Daniel Donne, the first MP for Oxford University in Parliament and Dr.John Budden, Regius Professor of Civil Law.
During the Civil War, the Hall was used as a mint for melting down the plate donated to the king by the Oxford colleges.
Part of the site was used in 1833 by John Cramer, then the principal, to build the Cramer Building as a hostel for undergraduates.
Under a statute of 1881, New Inn Hall was merged into Balliol College in 1887. Balliol acquired New Inn Hall's admissions and other records for 1831–1887 as well as the library of New Inn Hall, which largely contained 18th century law books. New Inn Hall was then used to accommodate students on an Indian Civil Service probationary course.
When the site was no longer required by Balliol, it was put up for sale. Most of the site was purchased by the City Council, and the buildings demolished to make room for a new Central School for Girls.