Genesis 1:1 says that in the beginning, God created everything. Dinosaurs are "something", so the Bible says that God created them. Revelation 4:11 confirms this verse and tells us that dinosaurs were created to give God pleasure. Who would have thought it?
Genesis 1:24-31 describes the sixth day of creation. On this day, God made all the land animals. Dinosaurs by definition are land animals.
http://www.creationsensation.com/dinodiff.htm While there are flying reptiles, like pteranodon, and marine reptiles, like elasmosaurus, that we often call dinosaurs, they really are not dinosaurs in a scientific sense. You'll notice in these verses that God creates a whole bunch of animals on the sixth day. He also creates man on that day. Man is special, distinct from the animals, because he is created in the image of God. Since man was created on the sixth day AND dinosaurs were created on the sixth day, then it follows logically that man and dinosaur were on the earth at the same time.
Matthew 1:1-17 contains the genealogy of Jesus Christ through his foster-father, Joseph. According the scriptures, Jesus was a direct descendant of the first man, Adam. A similar family tree for his mother's lineage is contained in Luke 3:23-48. Using this family tree as a basis for calculation, the Bible shows that Adam was created a few thousand years ago. Since Adam and dinosaurs were created on the same day, then the scriptures reveal that dinosaurs were first on the earth only a few thousand years ago, not millions of years ago.
According to Genesis 1:30, God gave plants to His original creation to be used as food. Dinosaurs - ALL dinosaurs - were originally plant eaters. No predators existed at this time, because there was no death at this time. Death first came about as a result of sin. (Romans 5:12 and 6:23)
After Adam and Eve disobeyed God in Genesis chapter 3, a curse came upon all the earth, including the dinosaurs. (Romans 8:20) Like the rest of the creation, dinosaurs had to adapt to a cursed environment and some dinosaurs became violent predators.
Genesis, chapters 6-9, tells of God's decision to judge the wickedness of man by sending a worldwide flood upon the earth. This flood would kill every man and animal, except for Noah, his family, and two of each land-dwelling, air-breathing animal. Dinosaurs fit that description, so they were undoubtedly aboard the ark when the flood began. They also disembarked at the end of the flood to repopulate the earth. The dinosaurs killed by the year-long flood were buried in layers of sediments and fossilized. Finding these fossilized remains is what excites paleontologists today!
After the flood of Noah's day, there was an apparent change of environment that significantly shortened the life spans of men. (Genesis, chapter 11. Better bring a calculator and come paper for this one!) Presumably, dinosaurs also suffered in this new environment and eventually died out, becoming extinct. The exact time of extinction is not known. However, dinosaurs appear to have been present several hundred years later in the time of Job. In Job 40:15-24, God calls Job's attention to an animal whose description sounds amazingly like a sauropod dinosaur.
http://www.creationsensation.com/bible_dinosaurs.htm