When was the last refinery built in the United States?
http://www.eia.gov/tools/faqs/faq.cfm?id=29&t=6
There were a total of 144 operable petroleum refineries in the United States as of January 1, 2012.
The “newest” refinery in the United States began operating in 2008 in Douglas, Wyoming. However, the newest significant (or sophisticated) refinery began operating in 1977 in Garyville, Louisiana.
Capacity has also been added to existing refineries through upgrades or new construction. The most recent examples include:
In 1998, Orion Refinery massively upgraded and reopened a refinery in Norco, Louisiana, which was a small, simple refinery that originally opened in 1967. (It is now owned by Valero.)
Valero opened a “new” and very sophisticated refinery in 1983 in Corpus Christi, Texas, on the site of a simple refinery that originally opened in 1975.
The newest refineries currently operating in the United States are listed at the link: