The word 'dinosaur' does not appear in the Bible, but Job describes massive land and water creatures, Behemoth and Leviathan, in vivid detail. Scripture places the creation of all land animals within the same creation week as humanity, rather than millions of years earlier.
Because the term 'dinosaur' was coined in the nineteenth century, Scripture naturally does not use it, but Job 40-41 describes Behemoth and Leviathan as enormous, powerful creatures unlike anything commonly seen today, which many readers connect to large ancient animals. Genesis places the creation of land animals and humanity within the same sixth day of the creation week, rather than separated by long ages, so any such creatures would have existed alongside early humanity rather than millions of years before. Their disappearance is often understood in light of the global Flood described in Genesis 6-9 and the dramatic climate changes that followed it. Scripture does not give exhaustive detail here, so some humility about specifics is appropriate, but its consistent framework places these creatures within a relatively recent, unified creation history.
These themes are best read through the whole testimony of Scripture, emphasizing God's self-revelation in Christ, the active ministry of the Holy Spirit, and the restoration of the whole person. Bible study should lead to a changed life, compassionate service, and a clearer picture of God's loving character.