The Devon and Exeter Institution is a subscription library in the City of Exeter, Devon, founded in 1813 for "The general diffusion of science, literature and the arts". It is situated at 7, Cathedral Close, Exeter, in a building facing the north side of Exeter Cathedral which was formerly the Exeter townhouse of the Courtenay family of Powderham Castle.

A subscription library is a library that is financed by private funds either from membership fees or endowments. Unlike a public library, access is often restricted to members, but access rights can also be given to non-members, such as students.