We got official word yesterday that Supernatural has been picked up for an 11th season! Yes, it was pretty much a given considering the president of the CW loves the show and the ratings are still going strong, but it's always nice to get an early pick up and this one is the earliest ever.
Bring on Season 15, I say. :D
Supernatural is also moving to a new night starting on March 18th. It will air on Wednesdays at 9 pm after Arrow. Source