Below is a list of passenger ships who brought some O'Briens to America, Canada, Australia and New Zealand. These lists were collected from over 3000 ships passenger lists around the internet. These lists are the only ships passenger lists found that contain O'Briens. There are probably more passenger lists with O'Briens on them that I have not found yet. 

To save space on the server, I have listed only those passengers named O'Brien. For a complete list, click on the ships name.  You will be transported to the original site that carries the complete passenger list.  If you know of any other ships, please let me know so I can add them to the list below.

Below are the different areas of passenger ship lists.
I have added email links to those passengers who have been identified and have persons researching that family.