The Red Dragons (20-1-3), final four hosts, got goals from Alissa Karcz and Brooke Davis to overcome an early deficit and beat The College of New Jersey (18-5-0) in the first semifinal.
Chicago (17-1-4) topped DePauw (15-4-1) as Renee Neuner netted her 21st goal of the season in the 106th minute. Neuner also assisted on Monica Michelotti's 61st-minute opener; Corinne Scott forced overtime with an 83rd-minute strike.
Sunday's title game will begin at 1 p.m. EST.
NCAA DIVISION III
Saturday, Nov. 29 at Oneonta, N.Y.
Oneonta State 2 (Karcz 33, Davis 80) The College of New Jersey 1 (Peters 9)
Chicago 2 (Michelotti 61, Neuner 106) DePauw 1 (Scott 83) (2OT)
Sunday, Nov. 30 at Oneonta, N.Y.
Oneonta State (20-1-3) vs. Chicago (17-1-4), 1 p.m. EST