Jahana Hayes (D-CT) is the first black woman in Connecticut history to be elected to the House of Representatives.
So here are just some of the records that were broken and some of the winners who sealed their place in history.
An all-time record number of women ran in Congressional races this year and now there are more women in Congress - 113 - than ever before.
And it appears to have come true. That changed Tuesday, when two women defeated Republican incumbents.
For this wave of women leaders, the next few years are going to be about much more than stereotypical women's issues.
Another New York incumbent has secured her seat for an additional term, according to the AP.
"There is nothing inherently noble about protecting a status quo that does not serve the needs of working-class Americans", said Ocasio-Cortez, one of a handful of Congressional candidates this year who identified as democratic socialists.
Alexandria Ocasio-Cortez, congresswoman-elect for New York's 14th district.
"We have made history tonight", she told cheering supporters after the result was confirmed. Women were projected to win in eight races, one shy of the current record. With women expected to make major gains in the midterm election, women of color represented the chance to spark a rise in both gender and racial diversity in Congress. Jared Polis became the first openly gay elected governor in the state of Colorado along with Ms Davids in Congress.
The two Democrats are the first Native American women to be elected to Congress.
Sharice Davids of Kansas and Deb Haaland of New Mexico won their races, becoming the first Native American women in Congress. Davids racked up another distinction as the first openly LGBTQ person to represent Kansas. The district is already solidly blue, and even though her victory was all but guaranteed after winning the primary, Ocasio-Cortez kept campaigning.
They will also be joined by veteran politician Donna Shalala of Lebanese descent who won her seat in Florida.
"Let's get to the business of dancing and celebrating", she added. "This is the beginning because the message that we sent the world tonight is that it's not OK to put donors before your community", she had said.
As ABC political commentator Cokie Roberts put it: "For most of our lives we just looked down from the gallery and saw a bunch of guys in gray suits".
Former Navy pilot Mikie Sherrill flipped New Jersey's 11th away from Republican Jay Webber, giving Democrats control of the district for the first time in 36 years.
Our reporters witnessed long queues at polling stations across the country and also say turnout appeared to be high.