Warren County Pennsylvania (Historic Districts) has 2 places on the National Register of Historic Places including 1 place of National significance and 1 place of Statewide significance. Significant places include Cornplanter Grant and Warren Historic District.
Some of the country's most noteable architects helped create the Warren County places including Edward Albert Philips, Wetmore, Charles D. and et al.. Prominent architectural styles found in Warren Country are Greek Revival and Italianate.