The UIUC Library has an extensive collection of newspapers, both current and retrospective, in a variety of formats, including hard copy, microfilm, and digital reproductions. Not all of them are included in the online catalog. Many newspapers can be found through the Library Gateway.
You can also search for older newspapers through the History, Philosophy, and Newspaper Library's Historical Newspapers Database. This database is searchable by place of publication and by keywords from the title. For German studies, try indicating a particular German-speaking country, or simply search for all German language newspapers.
For assistance with finding both current and historical newspapers, please reach out to the History, Philosophy, and Newspaper Library at email@example.com.
The Center for Research Libraries in Chicago has an extensive collection of German newspapers in microfilm. To find them, search CRL's catalog for "newspapers" and then under the tab for newspapers, search by the title of the newspaper. To get access to the microfilms, order them through the Library's Interlibrary Loan and Document Delivery.
Chronicling America Historic American Newspapers - the database of digitized American historic newspapers, sponsored by the Library of Congress and the National Endowment for the Humanities, includes 26 German-American newspaper titles. For more information about this project see, Leah Weinryb Grohsgal, “Chronicling America’s Historic German Newspapers and the Growth of the American Ethnic Press.”