Goalkeeper Paige Yeich was a major reason Pennsville earned a share of the title in its second straight visit to the state final.
Glen Rock's Leah Jerome and Kim Mineo, who had scored 34 and 33 goals, respectively, tested Yeich early and often.
Neither scored, although Mineo picked up an assist on the Panthers' goal.
"We gave them a few shots, but Paige came up big, especially in overtime," Pennsville coach Greg Greenzweig said.
Said Meredith Guerin, the Glen Rock coach: "Their goalkeeper is outstanding."
Danielle Dantine, a junior back who excels at reading a play as it develops, supported Yeich's efforts.
Jerome and Mineo, a stunning combo with their speed and ball-handling abilities, saw their timed runs broken up time and again by Dantine once they got inside the penalty area.
Pennsville's offense took it to Glen Rock right away.
After a shot was deflected by a Panthers back, junior forward Lindsay Hitchner, owner of 16 goals this season, headed the ball to the feet of senior forward Jamie Mundell.
Mundell, timing her run well, scored her 23d goal of the season with 30 minutes, 41 seconds left in the first half.
Glen Rock evened the score with 10:06 to go in the half on a goal by forward Danielle Patoir.