There is no single Christian answer. Depending on the tradition, the interpretation of Genesis, and the weight given to scientific evidence, Christians place the age of the earth anywhere from about 6,000 years to 4.5 billion years. The divide runs not just between denominations but within them, making this one of the most internally debated questions in Christianity.
The Young Earth View: About 6,000 Years
The most widely recognized Christian claim about the earth’s age traces back to Bishop James Ussher, an Irish Anglican scholar who published The Annals of the Old Testament in 1650. Ussher worked backward through the genealogies and chronologies in the Bible, generation by generation, and arrived at a precise date for creation: the evening before October 23, 4004 B.C. In 1701, the Church of England adopted Ussher’s dates for its official Bible, and for the next two centuries those numbers appeared so routinely in printed Bibles that they, as paleontologist Stephen Jay Gould once noted, “practically acquired the authority of the word of God.”
Modern young earth creationism builds on that same logic. By treating the Genesis account as a literal, sequential history and accepting the Bible as without error, young earth creationists compress the entire history of the universe into roughly 6,000 years. Henry Morris, one of the movement’s most influential figures, placed creation at about 6,000 years ago and calculated that the flood of Noah occurred 1,656 years after creation. Organizations like Answers in Genesis and the Institute for Creation Research defend this timeline today.
This view is not a fringe position among American Christians. A 2019 Gallup poll found that 56% of Protestants believe God created humans in their present form, a position closely tied to the young earth timeline. Among weekly churchgoers of all denominations, that number climbs to 68%. Overall, 40% of American adults hold a strictly creationist view, believing humans were created in their current form within roughly the past 10,000 years.
The Old Earth View: 4.5 Billion Years
Many Christians fully accept the scientific consensus that the earth is approximately 4.5 billion years old, seeing no conflict between that number and their faith. This is the official position of the Catholic Church, the world’s largest Christian body. The Catechism states that “methodical research in all branches of knowledge, provided it is carried out in a truly scientific manner and does not override moral laws, can never conflict with the faith.” A 2004 statement from the Vatican’s International Theological Commission, endorsed by Cardinal Joseph Ratzinger (later Pope Benedict XVI), explicitly cited the scientific account: the universe erupted 15 billion years ago in the Big Bang, and earth formed about 4.5 billion years ago.
The Catechism also notes that scientific studies have “splendidly enriched our knowledge of the age and dimensions of the cosmos” and that these discoveries should inspire greater admiration for the Creator. Notably, the Catholic Church allows individual believers to hold either a literal six-day creation view or a guided-evolution view. In practice, the 2019 Gallup data shows that only 34% of Catholics believe God created humans in their present form, while 46% believe humans developed over millions of years with God’s guidance and 18% see no divine involvement at all.
The Eastern Orthodox tradition takes a similar approach. The Orthodox Church in America has published reflections noting that the Genesis creation stories “were not written to give us a blow-by-blow account of how we got here” and that Genesis “has nothing to say, for or against, the theory of evolution.” The church leaves the scientific question largely to science.
Among mainline Protestants, the picture is mixed. A survey of clergy from the seven largest mainline denominations found that 44% agreed evolution is the best explanation for the origins of life, while 43% disagreed. Episcopal and United Church of Christ clergy leaned more toward accepting evolution, while 70% of American Baptist clergy and 53% of United Methodist clergy rejected it.
Old Earth Creationism: Ancient but Not Evolved
Between the young earth and fully evolutionary camps sits a view called progressive creationism. Groups like Reasons to Believe, led by astrophysicist Hugh Ross, accept the mainstream scientific age of the earth and universe but reject biological evolution. In this model, God created different forms of life at different points over billions of years, intervening directly rather than allowing species to evolve from common ancestors. Progressive creationists point to events like the Cambrian explosion, a period when many new animal body plans appeared in a geologically short window, as evidence of deliberate creative acts rather than gradual evolution.
How Christians Read Genesis Differently
The age question ultimately comes down to how a person interprets the first chapters of Genesis, and Christians have developed several distinct approaches beyond a straightforward literal reading.
The “day-age” interpretation treats each of the six “days” of creation not as 24-hour periods but as long ages or epochs. Under this reading, the sequence of creation in Genesis loosely mirrors the scientific timeline (light, then water and atmosphere, then land and plants, then animals, then humans) while allowing for billions of years.
The “gap theory,” also called the “ruin-restitution” theory, preserves a literal six-day creation but places a vast stretch of time between the first two verses of Genesis. In this view, God originally created the heavens and earth billions of years ago (Genesis 1:1), that original creation was destroyed in a cataclysm, and the earth “became” formless and void (Genesis 1:2). The familiar six days then describe a re-creation that happened only thousands of years ago. Gap theorists argue that the Hebrew verb in the second verse is better translated as “became” rather than “was,” creating room for all of geological history before the creation week even begins.
The “framework hypothesis” takes a literary rather than chronological approach. It notices that Genesis 1 has a deliberate structure: the first three days address the earth being “formless” by creating spaces (light and dark, sky and sea, dry land), while the last three days address the earth being “empty” by filling those spaces (sun and moon, birds and fish, land animals and humans). Days 1 and 4 are paired, days 2 and 5 are paired, days 3 and 6 are paired. Proponents argue this elegant pattern reveals that the passage is organized by theme, not by calendar order, and that it was never intended to function as a scientific timeline. This view is common among theistic evolutionists and many academic theologians.
Why the Disagreement Persists
The range of Christian positions on the earth’s age reflects a deeper disagreement about how to read the Bible. Christians who hold to biblical inerrancy and interpret Genesis as straightforward history tend toward the young earth view. Christians who see Genesis as inspired theology, written to convey truths about God’s relationship to creation rather than scientific data, generally have no difficulty accepting the scientific consensus. And a significant middle ground exists for those who believe the Bible is fully true but that its truth operates in genres beyond historical reportage.
These positions do not map neatly onto how devout or serious a person is about their faith. Young earth creationists, old earth creationists, and theistic evolutionists all include committed, theologically informed Christians who believe they are reading Genesis faithfully. The Catholic Church, the Orthodox churches, and many Protestant denominations have formally stated that an ancient earth poses no threat to Christian belief. At the same time, young earth creationism remains the majority view among American Protestants and continues to shape science education debates in the United States.