The Ohio Highway Patrol says 47-year-old Deborah McDonald of Crystal Rock was walking home from a bar when she was hit by a car.
Investigators say McDonald had been drinking and celebrating her winnings before she died.
McDonald got a check for $5,520 on Tuesday and treated her husband and friends to dinner. Friends say she also bought a pair of wedding rings that the couple had been unable to afford.
McDonald won the money in the Ohio Lottery's TV game show "Cash Explosion Double Play."
The show is set to air Saturday.