The Act of Uniformity 1662 (14 Car 2 c 4) is an Act of the Parliament of England. (It was formerly cited as 13 & 14 Ch.2 c. 4, by reference to the regnal year when it was passed on 19 May 1662.) It prescribed the form of public prayers, administration of sacraments, and other rites of the Established Church of England, according to the rites and ceremonies prescribed in the Book of Common Prayer. Adherence to this was required in order to hold any office in government or the church, although the 1662 edition of the Book of Common Prayer prescribed by the Act was so new that most people had never even seen a copy. The Act also required that the Book of Common Prayer 'be truly and exactly Translated into the British or Welsh Tongue'. It also explicitly required episcopal ordination for all ministers, i.e. deacons, priests and bishops, which had to be reintroduced since the Puritans had abolished many features of the Church during the Civil War.

A few sections of this Act were still in force in the United Kingdom at the end of 2010.