The Arnold Palmer Invitational is a professional golf tournament on the PGA Tour. It is played each March at the Bay Hill Club and Lodge, a private golf resort owned since 1974 by Arnold Palmer in Bay Hill, Florida, a suburb of Orlando. The event was founded in 1979 as a successor to the Florida Citrus Open Invitational, which was played at Rio Pinar Country Club east of Orlando. It has had a number of different names since then, most of them including "Bay Hill", but has played under the Palmer name since 2007. On March 21, 2012, the Arnold Palmer Invitational and MasterCard Worldwide announced an extension to MasterCard's "Presented by" sponsorship until the 2016 tournament.
As a restricted field event on the PGA Tour, only the first 70 players on the previous year's money-list are guaranteed invitations.
Tiger Woods won what was then known as the Bay Hill Invitational four years in a row from 2000 to 2003. This is one of only four occasions that a golfer has won the same event four times in a row on the Tour.