The win was the 34th for King and her first since she won a playoff at the Corning LPGA Classic last May. The 45-year-old King is not the oldest winner in LPGA Tour history, as that distinction belongs to JoAnne Carner, who won the Safeco Classic in 1985 at the age of 46.
King comments on her 34th LPGA Tour win
'When I win now, it's more of a relief than anything,' King said after the becoming only the third American woman to win on tour this year, joining fellow over-40s Juli Inkster and Rosie Jones. 'Each time you win, it's like 'Is this going to be my last one?' '
Leslie Spalding (64), Donna Andrews (65), Tamie Durdin (67), Catriona Matthew (70), Jones (71) and Cristie Kerr (74) shared third at 6-under 207.
King began the final round one shot behind Kane and Kerr, and needed three holes to take the lead. She roped her 4-iron five feet from the stick and converted the eagle putt to take the lead, one she did not relinquish.
Kane needed to eagle the final hole to draw even with King, but she missed the green left and never recovered.
King won $180,000 for first place, her biggest check ever, and eclipsed the $7 million mark in career earnings, joining Annika Sorenstam and Karrie Webb as the only three players to reach that milestone.
This event holds special meaning for King, as she became the first three-time winner in this event's history and her 1995 win here qualified her for the LPGA Hall of Fame.
King's lead stretched to four after a 15-foot birdie at the 11th, coupled with a Kane bogey at the ninth that included her playing a shot backward so that she had a play at the putting surface.
King made her only mistake of the round at No. 14 after she hit her tee shot left and failed to convert a five-foot par save. Kane birdied the par-five 16th to get within two of the lead.
Kane was impressed with her older adversary.
'She has a great will to win,' she said. 'And I've read quotes of hers where she's said 'Golf is a game that doesn't retire you.' She's dedicated. I was going to dinner last night, and she was still chipping on the side of the practice green.'
Kane, in her quest for a fifth LPGA Tour title, managed only a 1-under 71 on Sunday, but Kerr struggled even more trying for her first LPGA Tour victory. She carded five bogeys and only two birdies Sunday.
Karen Stupples, Terry-Jo Myers and Michelle Estill tied for ninth at minus-five.
Full-field scores from the ShopRite LPGA Classic