For individual newspaper titles, check the CMU Library catalog for the most up-to-date access information. Other libraries may have copies of other newspapers. You can use either search Worldcat or the Center for Research Libraries' (CRL) catalog to see what might be available. CRL has more than 10,000 titles from most countries of the world and every state in the U.S., including over 1,800 U.S. ethnic titles and some of the earliest African American newspapers.
If you want to find names of historic American newspapers for a particular city, and the dates of publication, see:
Instant, browseable access to more than 7,000 newspapers and magazines from around the world, covering more than 120 countries and 60 languages. Create an account via this link and then you can download the PressReader app and sign in with the email option.
It's simple, just go to Journals & Newspapers, type in the title of the newspaper and press return! If we have access to it via a database, the database name and dates of coverage will be listed.