The winning ticket correctly matched all five white balls, 23-29-32-45-46, but not the yellow Mega Ball 15, to earn the $1 million prize from the February 21st drawing.
The ticket was sold at the 7-Eleven store located at 1335 Sandy Hill Road.
The retailer will receive a $5,000 bonus for selling the winning ticket.
The winner has one year to claim the prize.
The holder of the winning ticket should call the Lottery at 717-702-8146.
The estimated value of this Tuesday's Mega Millions jackpot is $195 million.
Lottery officials say more than 102,900 Pennsylvania Lottery Mega Millions tickets won prizes in the Feb. 21 drawing.