You might want to look at the Newspapers! tab on this site to find information about those geographically oriented collections as well as others. But also take a look at the sites below for a means to find these special collections.
For specific ethnic oriented collections you can do a search on the Library of Congress Chronicling America site. Click on "All Digitized Newspapers" and then click on "Ethnicity". There you will have the option to find newspapers in that collection such as African-American, French, German, Indians of North America, Irish, Jewish, Latin-American, Mexican, Pacific Islander, and Spanish. You can also search for newspapers in 6 different languages.
Newspaper Cat also allows you to list newspapers by language and by topic. There are over a dozen different languages represented. And many topics to choose from.
In the last year, I have summarized links to a few of these special collections for you, accumulating from a variety of sources.
You can check these out here:
- African-American Online Historical Newspapers Summary
- Irish-American Historical Newspapers Summary
- Jewish-American Historical Newspapers Summary
- Farming Newspapers
And here are some links to special collections available elsewhere:
- College Newspapers
- Hispanic American Newspapers - this requires a subscription; however might be available at your nearby University library, so check with them
Many university libraries have access to special collections as well. There are too many to name here so I recommend checking with your university library of choice and see what they have available. Most require community access registration for access online.
So check out ethnic, language and topic-based collections. You just might find some nuggets about your ancestors not available anywhere else!