Anna Throne-Holst will be the next supervisor of Southampton Town.

With 100 percent of election districts reporting, Ms. Throne-Holst, who ran on the Democratic, Independence, and Working Families lines, has received 6,884 votes to Republican incumbent Linda Kabot’s 4,990, a 58 percent to 42 percent victory, according to the Suffolk County Board of Elections.

Ms. Throne-Holst, who did not prepare a victory speech for election night, addressed the crowd of her supporters at Four Seasons Caterer in Southampton Village Tuesday around 11:20 p.m. surrounded by her sons, Sebastian, Max and Nicholas. She loosened her suit jacket, donned a colorful scarf and said she was “honored and humbled” by her win for supervisor. “This has been a wonderful, life-changing process,” she said.

She thanked Ms. Kabot for her years of service to Southampton Town and wished her well on her next endeavor. “She’s a talented woman and she has a lot to offer,” Ms. Throne-Holst said.

She asked her supporters to continue to support her as she transitions to Southampton Town’s top job.

“Please, everyone, stick with me,” she said. “I need every single one of you.”

“We ran a good campaign, as best as we could under the circumstances,” Ms. Kabot said during her concession speech, “and please know that I really appreciate all of the support and encouragement of so many people during this year’s race and for my prior years of public service.”

In her closing remarks, Ms. Kabot, red-faced and watery-eyed, spoke proudly of her time as an elected official. She said her “thick skin and strength of character” got her through difficult times in Town Hall.

But the supervisor, whose term ends on December 31, did not rule out another run for public office: “This door may have shut for me, but another door will open. You haven’t see the last of Linda Kabot yet.”

Incumbent Chris Nuzzi and running mate Jim Malone, the two Republican, Conservative and Independence party candidates for Town Board, bested the two Democratic and Working Families party nominees, incumbent Sally Pope and Bridget Fleming.

Ms. Fleming said during her speech at the end of the night that she was so proud because five months ago, no one knew who she was. But on Tuesday, 5,000 people have voted her.

After her remarks, she said she was very happy for the Democratic candidates who won that night, and she was very happy that people supported her during her campaign. “It shows that the town is ready for a change,” she said.

Ms. Pope thanked the party and her supporters. “You really made it possible,” she said.

Ms. Throne-Holst, who is not a member of a political party though she ran on the Democratic line, will be the minority member of the Town Board, with Mr. Nuzzi, Mr. Malone and Councilwoman Nancy Graboski in the Republican majority. A special election will occur to fill the Town Board seat Ms. Throne-Holst will vacate when she assumes the supervisor post.

Southampton GOP Chairman Ernest Wruck acknowledged that the defeat of Ms. Kabot was a setback for the party in it’s bid to increase the party’s majority on the Town Board. He called for the party to unite to take Ms. Throne-Holst’s vacated seat in a special election.

“We’ve kept control of the Town Board under very difficult conditions and I’m pleased by that,” Mr. Wruck said. “We now have three of the four votes on the Southampton board and it appears that there is a vacancy. We intend to win that vacancy and take control of the Southampton Town Board.”

A ballot proposition that asked voters on Tuesday if the town should change its procedure for filling vacancies in elective office from appointment by the Town Board to special election passed with 66 percent of the vote.

Deputy Supervisor Bill Jones said he was surprised by the margin at which Ms. Kabot was defeated.

He said the town’s fiscal crisis and Ms. Kabot’s contentious budget cuts for 2010 weighed down her ticket, contributing to the loss.

“People perhaps needed to blame somebody and the buck stopped with Linda Kabot,” he said.

Mr. Jones named personal issues including Ms. Kabot’s DWI arrest this past Labor Day as detractors to her re-election bid.

“Clearly that had an impact,” he said. “There were just too many hurdles with all that was going on in Town Hall and in her personal life.”

Democrat Bill Pell scored a darkhorse victory, ousting Republican Brian Tymann from the Board of Trustees.

“I feel very happy,” said Mr. Pell, who has tried for a Trustee seat before but did not succeed. “It’s a long time coming.”

Mr. Pell will join the four incumbent Republicans who won reelection on Tuesday: Ed Warner Jr., Jon Semlear, Eric Shultz and Frederick Havemeyer.