Jefferson County Pennsylvania (Historic Districts) has 3 places on the National Register of Historic Places including 2 places of National significance. Significant places include Clear Creek State Park Day Use District and Clear Creek State Park Family Cabin District, Brookville Historic District.
Some of the country's most noteable architects helped create the Jefferson County places including Civilian Conservation Corps. Prominent architectural styles found in Jefferson Country are Late 19th And 20th Century Revivals and Late Victorian.