The 22-year-old made a 15-foot birdie putt on the par-3 18th to close with a three-under 68 and finish at 14-under 270.

Lee was projected to jump from fourth to a career-high second in the world rankings when they are released on Monday after her fourth top-three finish in her past seven starts.

"I've been hitting it pretty solid and playing pretty solid, and I felt like (a win) was close. I feel pretty good with this one," Lee told Golf Channel.

"For the rest of the year I will do my best, have fun and try and get a couple of more wins."

"For the rest of the year I will do my best, have fun and try and get a couple of more wins."

Sei Young Kim was second. The South Korean birdied holes 13-15 to pull within two strokes, but parred 16 and 17 and bogeyed the 18th for a 66.

Annie Park (67) and Morgan Pressel (68) tied for third at nine under.

Lee's young countrywoman Hannah Green, who shared the lead after round one, carded an even-par 71 in the final round to finish in a tie for 14th at four under.

Lee led the last three days at Wilshire Country Club, shooting 66-69-67, to take a one-stroke advantage over Nanna Koerstz Madsen into the final round.

Koerstz Madsen shot a 76 to finish 13txh at five under. She was trying to become the first Danish winner of an LPGA event.