A longtime favorite, ASP includes the New York Times, Wall Street Journal, Washington Post, & Christian Science Monitor as well as other newspapers and magazines. Under "Search Options" limit to "newspapers." Or search the entire database for comprehensive coverage.
Full-text of international and national newspapers. Click on "Publications" [in the blue box] then limit to "newspapers"
If you need more local coverage, try searching the Internet for the name of your city along with the word "newspaper" to identify sources. In most of the newspaper databases you can search by publication, or a city name.