From Irish Iowa site,

 

 

http://www.celticcousins.net/irishiniowa/pennyemigrantguide.htm

New Orleans, major destination pre 1860:

https://durrushistory.com/2014/01/26/in-1845-in-louisiana-usa-the-priests-were-exhorting-the-immigrant-irish-to-forsake-the-grog-halls-of-new-orleans-and-go-up-the-mississippi-like-the-germans-to-claim-the-free-land/