Fifth.
Illinois is ranked 25th with 57,914 sq. miles.
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.
4.10% of the total US population lives in Illinois.
7
The US state of Illinois has a population of 12,910,409
It is the 26th most populated US State.
Colorado's rank number in the US by population is #22.
Probably about 1,532,853
Huston is the 4th largest US City by population.
It is the 10th largest US State by Population.