The Oil Region is an unofficial region in the western part of the U.S. state of Pennsylvania that encompasses the land in and around the Oil Creek valley. It is so named because it includes the first oil fields discovered in the United States (see History of the petroleum industry in the United States).
- Shaw, L. C.; W. F. Busch (June 1984). Pennsylvania Gazetteer of Streams, Part II. Water Resources Bulletin. 16. Prepared in Cooperation with the United States Department of the Interior Geological Survey. Harrisburg, PA: Pennsylvania Department of Forest and Waters. p. 270.
- ""Drake Well"". Friends of Drake Well, Inc. and the Pennsylvania Historical and Museum Commission. Retrieved 2007-11-09.
- "Pennsylvania Trail of History". Pennsylvania Historical and Museum Commission. Archived from the original on 2007-10-15. Retrieved 2007-11-09.