千禧年前论（英语: Premillennialism）是终末论的理论之一，相信耶稣的肉身将要再临地上，开始祂千年国的统治（基督复临安息日会解释为在天堂统治）。被称为"千禧年前论"，是因为它认为耶稣再临将会发生在千年国开始之前。与千禧年后论（postmillennialism）或无千禧年论（amillennialism）等其他终末论不同，前者认为耶稣再临将会发生在千年国开始之后，而后者认为千禧年只是象征性的。

千禧年前论主要基于对新约启示录 20:1-6 的字面解释，该段描述耶稣再临地上，在大灾难末期开始千年国的统治。千禧年前论者认为这是从旧约以来，将要应验给予神子民的应许。其他解释如东正教则声称，启示录这段是描述基督统治天堂的现在，这样的解释认为启示录的象征是指一个属灵的争战，而不是在地上的物理战斗。无千禧年论者解释千禧年为一段象征性的时期，例如认为千禧年代表神对祂的创造或教会的统治，这与启示录本身启示体裁的高象征性一致。

Premillennialism, in Christian eschatology, is the belief that Jesus will physically return to the earth to gather His saints before the Millennium, a literal thousand-year golden age of peace. This return is referred to as the Second Coming. The doctrine is called "premillennialism" because it holds that Jesus' physical return to earth will occur prior to the inauguration of the Millennium. It is distinct from the other forms of Christian eschatology such as postmillennialism or amillennialism, which view the millennial rule as occurring either before the second coming, or as being figurative and non-temporal. For the last century, the belief has been common in Evangelicalism according to surveys on this topic.