Klein Quinn said she was humbled by the support, especially the large number of people at the meeting to see her get sworn in as mayor.
"Together we will continue to achieve great things in the city of Tomball ... We are all joined together despite our differences by our love of this town," she said.
Klein Quinn said she wants to people to think about getting involved and how they can help the city.
She thanked her family, her campaign team and those who supported her and said she looks forward to working with everyone for the future of Tomball.
Randy Parr was also sworn in for City Council Position 5 to complete the position's unexpired term, previously held by Klein Quinn.
"I look forward to a lot of hard work going into what needs to be accomplished, there are things that we need to do that I think will make life better for everybody, and I look forward to those challenges," Parr said.
City Manager David Esquivel presented outgoing mayor Gretchen Fagan with a memorial gavel on a plaque for her 14 years of service as mayor as well. She was first elected in 2007 as mayor, Community Impact Newspaper previously reported.
"It is my honor to present to a token of our appreciation for your leadership, your years of service and your unwavering strong support for everything that we do," Esquivel said.
Fagan said it has been an honor to be mayor of Tomball and thanked everyone for giving her that opportunity over the years.
"We've come a long way, and we've done so many things and I can't wait to see what the future holds for us," Fagan said.
A runoff election will be held June 4 to determine who will be elected to Position 3; early voting begins May 23 at City Hall.