According to the Book of Genesis, Noah was 600 years old when the floodwaters came upon the earth.
Genesis gives Noah’s age at the beginning of the Flood in its account of the ark and the rising waters. The number belongs to the biblical narrative’s chronology, which also records Noah’s age at other important points in his life.
This figure is sometimes confused with Noah’s total lifespan. Genesis later says Noah lived for 950 years, so 600 was his age when the Flood began, not the length of his life. The same chapter identifies his sons as Shem, Ham, and Japheth.
The ages in Genesis are part of a genealogical framework rather than a modern historical dating system. They help connect Noah’s story with the generations before and after the Flood, while the narrative focuses mainly on the ark, the surviving family, and the covenant that follows.