Fifth.
Illinois is the 21st US State.
In area it ranks right in the middle at 25th. However, it has the fifth highest population, due primarily to Chicago and its metropolitan area.
It was the 21st US State.
It's the 5th biggest state. Its population is almost 13,000,000.
Tennesse is rank 19000
illinois rank in population among states
deep
Illinois
It is the 32nd largest US State.
It is the 42nd largest US State.
It is the 35th largest US State.