A great resource that may help you Find Your Mexican Ancestors in the Worlds Newspapers is Eliphind. It has proven to be a great tool while doing research for others but unfortunately not so much useful in my own research.
Also, you will only find two newspapers pertaining to Mexico here but I wanted to especially point out this resource since it contains over 2677 newspapers from around the world. I know many readers of this blog live in other countries other than the United States. Mexicans have not just migrated to the United States but to other countries as well.
How can Eliphind Help You Find Your Mexican Ancestors in the Worlds Newspapers?
What Elephant will do for you, is search many newspapers from around the world for your particular ancestor.
Your focus, especially if you have been able to trace your ancestors to Mexico, is to search the newspapers of the country that you now live in and try and see if your family made into local newspapers and search for clues that may point out where they were from in Mexico.
Tip: Be on the look out specially for obituaries and also any wedding notices.
Screen Shot of Eliphind:
To play with this resource just enter your last name and see all the articles that will pop up.
Also don’t forget that even though almost all newspapers are from other countries many of them would also write stories about Mexico.
You never know, your ancestor might just be mentioned in one of them.
So if you have not tested this resource out I highly recommend that you do.