Here are some notable newspapers in microfilm:
Here are two of the major newspapers that have indexes in print. There are others. The coverage will vary. Check the catalog for call numbers and holdings.
Contains material found in historic periodicals and books covering American history from the 1700s to 1900. Eyewitness accounts of historical events, descriptions of daily life, editorial observations, commerce as seen through newspaper articles, advertisements, and genealogical records.
Early American Newspapers offers several hundred thousand fully searchable issues from more than 250 significant 17th, 18th and 19th century newspapers from all 50 current states.