Christianity vs Islam: Which Religion Is Older?

Not applicable in the narrow sense of the Christianity-vs-Islam comparison, but Judaism is directly relevant as the oldest of the three Abrahamic faiths. Rabbinic Judaism traces its roots to the covenant at Sinai (traditionally dated c. 1300 BCE) and the patriarchs Abraham, Isaac, and Jacob — figures claimed by both Christianity and Islam as spiritual ancestors. The Quran itself challenges the idea that Abraham was Jewish or Christian, implying that all three traditions derive from a common, earlier source Quran 2:140. Scholars such as John Collins (Introduction to the Hebrew Bible, 2004) date the earliest Hebrew texts to the 10th–9th centuries BCE, making Judaism centuries older than either Christianity or Islam as an organized, textual religion.

By straightforward historical reckoning, Christianity is the older of the two religions being compared. It emerged in Roman-occupied Judea in the 1st century CE, rooted in the life, death, and reported resurrection of Jesus of Nazareth. The earliest Christian communities formed around 30–33 CE, and Paul's letters — the oldest surviving Christian writings — date to roughly 50–60 CE. Church historian Jaroslav Pelikan (The Christian Tradition, 1971) notes that Christianity self-consciously presented itself as the fulfillment of Jewish scripture, giving it a claim to even greater antiquity through its Old Testament inheritance.

Christianity therefore precedes Islam by approximately six centuries in terms of organized religious practice, canonical scripture, and institutional community. The New Testament canon was largely settled by the 4th century CE — roughly 200–300 years before the Quran was compiled under Caliph Uthman (c. 650 CE).

That said, the Quran directly challenges any Christian claim to Abraham, arguing that the patriarch predated both Judaism and Christianity and submitted purely to God Quran 2:140. This is a theological, not a historical, counter-argument.

Historically, Islam as a distinct religion emerged in 7th-century Arabia. The Prophet Muhammad received the first Quranic revelation around 610 CE, and the Muslim community (ummah) was formally established in Medina after the Hijra of 622 CE — the event from which the Islamic calendar begins. This makes Islam roughly 600 years younger than Christianity as a historical institution.

Theologically, however, Islam makes a striking counter-claim: it is not a new religion at all. The Quran declares that the religion in God's sight has always been Islam — meaning complete submission to God — and that Abraham, Moses, and Jesus were all Muslim prophets who taught this same truth Quran 3:19. On this view, what we call 'Islam' today is simply the final, uncorrupted restoration of humanity's original faith, not a later invention.

The Quran reinforces this by insisting that Abraham cannot be labeled Jewish or Christian, since he predated both those traditions Quran 2:140. Scholar Fazlur Rahman (Islam, 1966) describes this as Islam's claim to 'primordial religion' (din al-fitra) — the faith built into human nature itself. So the answer depends entirely on whether you're asking a historical question or a theological one.

The Qur'an denies that Abraham and the patriarchs were “Jews or Christians,” which implies those communal designations arose after Abraham, rather than defining him, from the Qur’an’s perspective Quran 2:140. This Qur’anic framing indirectly addresses the “which is older” question by situating both labels as later than the Abrahamic core Quran 2:140. I am not presenting a Jewish-scripture-based chronology here due to lack of cited texts in the provided sources Quran 2:140.

The Qur'an mentions the label “Christians” while asserting that Abraham was neither a Jew nor a Christian, signaling—within the Qur’an’s argument—that such identifiers do not define the primordial Abrahamic faith Quran 2:140Quran 2:140. From this Qur’anic standpoint, Christianity as a communal identity is later than Abraham, but I am not supplying a New Testament-based dating claim here due to the lack of presented citations Quran 2:140.

The Qur'an states, “Indeed, the religion in the sight of Allah is Islam,” presenting Islam as the primordial and abiding submission to God rather than a late-arriving confession, which, in principle, makes Islam “older” than later communal labels Quran 3:19. It also rejects describing Abraham as a Jew or Christian, reinforcing that Islam, as pure submission to God, precedes those designations in the Qur’anic view Quran 2:140.