Shin, a 21-year-old rookie sensation from Korea, took the lead in Friday's second round and never relinquished it. She birdied the first hole and cruised to the title on a somewhat rainy day at Locust Hill Country Club.
Morgan Pressel had started the final round four shots behind Shin, but shot a 78 and finished 11 behind at six-under-282.
Shin seemed tense when she teed off but settled down after starting her round with the birdie.
"That birdie changed my feeling," she said. "I got my confidence back."
Shin had a bogey on the par-3 seventh after teeing off into the rough. She birdied the 10th hole but then had back-to-back bogeys at 13 and 14.