The incident began around 12:50 p.m., Sunday, March 14, in the Tarrytown area of the bridge, said Trooper Tara McCormick.
According to McCormick the Good Samaritan, along with a tow truck driver, were able to talk with the woman and grab her before she could jump.
The woman was turned over to New York State Police who transported her to an area hospital for treatment.
For those needing help, the National Suicide Hotline is available 24 hours a day, seven days a week at 800-273-8255.
The old Tappan Zee Bridge's official name was the Governor Malcolm Wilson Bridge. The new Tappan Zee Bridge's official name is the Governor Mario M. Cuomo Bridge.
Click here to follow Daily Voice Mount Pleasant and receive free news updates.