Noh, who has previously won on the European Tour (Malaysian Open) and the Web.Com Tour, has long been considered a precocious talent and this victory further confirms just that.
Noh converted a two shot 54 hole lead over Keegan Bradley into victory, Bradley surprisingly backing of with a final round of 75 to finish 8th.
Jeff Overton appeared to be a challenger early but could only tread water over the closing nine holes.
The leading four finishers were all chasing their first PGA Tour victory.
Noh will move some 85 places in the world ranking to around 88th and becomes the leading ranked Korean male golfer.
Stuart Appleby continued his recent good form with another top twenty when he finished 17th to be the leading Australian. Bronson La Cassie secured his best PGA Tour finish when 21st, Robert Allenby was 25th and John Senden 29th.