The answer to your question is,
Louisiana is quite popular compared to lots of other states. It is the 24th most population dense in all 50. There is a major city in Louisiana, New Orleans, with about 1.3 million people currently residing. Louisiana's population density is due to the cultural, economic, and such things about it. So much history is to be learned here, so many different foods, so many of this and that. People are always traveling to Louisiana for these reasons and many more, which creates a bigger and denser state. :)
-Mabel <3
(This is what I know, since I currently reside there.)