Summon is a service that allows you to quickly search, discover and access reliable and credible library content in digital and print formats, audio and video, single articles and entire e-journals, and every format in between. Enter your terms in one search box, and quickly get credible results in one relevancy-ranked list.
The library provides access to hundreds of full text newspapers, whether they're online or on microfilm. To find a comprehensive list of the available newspapers, see the Newspapers: Finding Current and Historical Newspapers.
To identify U.S. newspapers that were published in a particular place at a particular time use the directory of historical newspapers in the United States at the Chronicling America web site.
Note that not all of these newspapers will be available full text, but the directory will help you determine which titles existed in the place and time you need.