Is Texas in Oklahoma?

No, it is not. Texas and Oklahoma are neighboring states of the United States, and they are not the same. Oklahoma does share a border with Texas; there is also a Texas County in Oklahoma. But when you are talking about Texas, you are talking about a separate state, which is not part of Oklahoma at all.
No, it is not. Texas and Oklahoma are neighboring states of the United States, and they are not the same. Oklahoma does share a border with Texas; there is also a Texas County in Oklahoma. But when you are talking about Texas, you are talking about a separate state, which is not part of Oklahoma at all.