Christian era may refer to
- the time since Christianisation in any given regional context.
- in Christian eschatology, the age of the Church, between the age of Law and the Millennial age, see Dispensation (period)
- calendar eras: Calendar era#Christian era
- the Dionysian era or Common Era used in Western Christianity
- Etos Kosmou (Greek Orthodoxy)
- Era of the Martyrs (Diocletian era)
- Incarnation Era, see Ethiopian calendar
- Armenian calendar era (AD 552, year of the Monophysite schism)