Beyond being part of the influx of elected LGBTQ officials, Hill also succeeded in defeating a Republican representative incumbent who opposes abortion and who believes marriage is between one man and one woman.
Hill was leading with about 52.2 percent of the vote midday on Wednesday when Knight called to concede the race, according to KCBS-TV, a local CBS affiliate.
"The voters have spoken, and they want a new congressman -- or a congresswoman, for this district," Knight said in his concession call. "We wish her the best."
Running on a campaign of promising to work to expand health care, rebuild the middle class, and ensure government represents all the people, including LGBTQ people, 31-year-old Hill worked tirelessly with volunteers to knock on doors and get her message out, she told The Advocate in an interview ahead of the election.
Hill experienced pressure to stay in the closet during the campaign and she also endured biphobia. Still, the decision to campaign as an out woman was a no-brainer.
"I've been out as being bi since I was a teenager, right after high school," she told The Advocate, adding that being out was part and parcel of being "an honest, transparent politician."
"Having true equality is just something that I think should be a given," Hill said about LGBTQ rights.