Rep. Randy Vulakovich on Saturday beat seven other candidates, including former U.S. Rep. Melissa Hart, for the nomination. Representatives from Allegheny and Butler counties cast four ballots at a Republican meeting in Cranberry before choosing the 62-year-old from Shaler.
Democrats earlier picked 59-year-old health care consultant Sharon Brown to run in the Aug. 7 election for the 40th District seat.
Orie resigned last month and has since been sentenced to 2 1/2 to 10 years in state prison on campaign corruption charges.
Hart formerly held the seat but resigned when she was elected to Congress in 2000. She lost the congressional seat in 2006.