 Hazeltine House, John P. Jefferson House, Struthers Library Building, Warren Armory, Warren County Courthouse, Wetmore House, Guy Irvine House ("The Locusts") and Woman's Club of Warren are listed on the National Register of Historic Places.Warren is located at (41.844133, -79.142443).The city is located at the confluence of the Allegheny River and the Conewango Creek.