Kim closed with a four-under 68 to get to 10-under-par 206. Pak, who led by two after two rounds, managed a one-under 71 in the final round to join Kim in the playoff. Kim downed Pak on the second extra hole for the win.
The win for Kim was her fifth of the season in 17 starts. The $10,500 she earned for the victory puts her more than $17,000 ahead of the Charlotte Mayorkas for the money lead on the Futures Tour.
Kim also moved within $6,443 of the single-season money record on the Futures Tour. Beth Bauer earned $81,529 in 2001 for the single-season mark. Kim has one event left, the ILOVENY Championship, to try and establish a new earnings record for a single season.
Kristy McPherson, a two-time winner this year, also closed with a 71. She took third place at eight-under-par 208, while Angela Park was one stroke further back after a closing 66. That finish helped Park climb to fifth on the money list.
Kristina Tucker took fifth place at six-under-par 210, while Meaghan Francella and In-Bee Park shared sixth place.
Brandi Jackson ended alongside Julie Tvede in eighth at minus-four. Ha-Na Chae finished alone in 10th at three-under-par 213 thanks to a final-round 70.