Jankovic didn't put a foot wrong as she downed her Danishopponent 6-2, 6-4 to claim her 12th career title and her first since Cincinnatilast August.
"It's been a great two weeks for me, really amazing,"Jankovic said. "I'm so happy and so thrilled that I was able to win thistitle."
The Serbian came into the tournament ranked ninth in theworld and seeded sixth, while world number four Wozniacki was seededsecond.
But neither woman had made much noise this season, with bothfailing to reach a quarter-final until this week.
Jankovic arrived inIndian Wells off a tough first-round exit at Monterrey, where she was the topseed.
She had her struggles here, eking out a third-round victoryover world number 49 Sara Errani that the Serbian said was a "wake-upcall."
After that, she was able to sharpen her focus, reduce hererrors, and transfer some of her recent good work on the practice court to hermatches.
"On the practice court, I felt really well. I was feelingthe ball and I was really moving my feet and getting better and better," shesaid.
She had Wozniacki on the defensive early, rolling to a 4-0 leadin the first set before the Dane managed to break her to cut the deficit to4-2.
Jankovic broke back immediately and pocketed the first set onher third set point as Wozniacki fired a forehand long.
"I went outknowing my game plan," Jankovic said. "I wanted to be really aggressive, but atthe same time patient and not really go for too much or go over the limit withsome balls.
"I waited for my opportunities, and when I had them, Itook them."
She maintained the momentum by breaking Wozniacki in theopening game of the second set, and made the break hold up. She earned a matchpoint with a backhand winner and sealed it when Wozniacki belted a servicereturn long.
"Jelena was playing a good match," Wozniacki said. "Shedidn't make a lot of mistakes. I tried to change it when I saw it was not goingmy way, but I just made a few too many errors on the importantpoints.
"I couldn't really get to play the game that I wanted toplay," Wozniacki added. "I wanted to get her moving a little bit more. I wantedto stay on the baseline a little bit more."
Wozniacki, who made anexciting run to the US Open final last September, will move up to a career-highnumber two when the world rankings are updated on Monday.
The19-year-old said it was some consolation.
"When I think back on thistournament, I think I've done a great job," she said. "Everyone was playing hereexcept for the two Williams.
"It was a strong field, and then comingout as a finalist and then coming out as number two in the world tomorrow,that's still a great feeling."