She's also now America's youngest elected lawmaker as a delegate in the West Virginia House.
Blair won her election with 63 percent of the vote defeating Democrat Layne Diehl, a 44-year-old attorney.
Diehl told the Wall Street Journal, "I'm very proud of the race that was run on both sides. I look forward to seeing what her leadership brings to the state of West Virginia."
According to Blair's issues page, she's very conservative. Her campaign was endorsed by the NRA, she opposes abortion, supports voter ID requirements, opposes Common Core education, wants to drug test those who receive public assistance and is against gay marriage.
On election night she wrote on her campaign's Facebook page: "When I made the decision to run for public office, I did so because I firmly believe that my generation's voice, fresh perspective and innovative ideas can help solve some of our state's most challenging issues"
Blair is the daughter of State Senator Craig Blair.