Incumbent Jack Ciattarelli was re-elected, while Andew Zwicker edged Simon in a close race for second place.
Lempert was first elected mayor of a consolidated Princeton in 2012.
Two dozen incidents in Princeton this year prompted state legislation.
Each candidate garnered 25 percent of the vote.
Results from Tuesday night's county-wide races.
Get results of the municipal and school board elections here.
Tuesday is Election Day.
Ford Scudder is set to take over the position on Nov. 9.
The forum takes place on Oct. 22 at Mercer County Connection.
A group of residents submitted this open letter to Princeton Mayor and Council.
The county was one of 12 counties placed under the watch by NJDEP on Wednesday.
The New Jersey governor – who underwent weight loss surgery in 2013 – has given the state National Guard leader 90 days to shed some pounds.
Proposed changes call for the elimination of free parking for library patrons.
The post office is moving to the site of the old West Coast Video, next to the new 7-11.
A Superior Court judge will determine how much affordable housing Princeton should have.
Radio ads will encourage people to use public transit or to watch it on T.V., advising people to avoid unnecessary travel.
A YouTube video that went viral shows Christie getting testy with a voter who challenged the contradiction.
“We can do it, and we can bring in the folks from FedEx to use the technology to be able to do it," Christie said in the below video.
A mistake by the Board of Assessors may be costly for Princeton residents.
Residents who were not living in the homes in question at the time of the work are being asked to pay up.
Council meets Monday night, 7 p.m., at the municipal complex, preceded by a special closed session.
Liz Lempert, Jenny Crumiller, Bernard Miller and Jo Butler all signed a recent petition.
LCOR Ventures is buying the former Post Office building at Palmer Square. Financial terms of the deal have not been disclosed.
The workshop takes place at the Robbinsville Senior Center.
The governor got into a sharp exchange with Republican Sen. Rand Paul of Kentucky during the GOP debate on Thursday night.
The hire appears to have its roots in a recent meeting over paid sick leave for municipal employees.
Just 30 percent of voters have a favorable opinion of Christie, an 8-point drop since April, according to the latest Rutgers-Eagleton Poll.
The NJEA has called on Christie to resign after the governor, in a CNN interview, said the "national teacher's union" deserves a punch.
Nate Barson assumes the position previously held by Mark Johnson.
The move satisfies library officials, who have grown tired of people using the library just to validate their parking in the garage.
Council approved the hiring of two consultants Monday night.
Who's running in this year's elections?
Temperatures are expected to hit the lower 90s each of the next few days.
The governor got into a 5-minute heated exchange with a guns rights activist during an Iowa town hall meeting (see below video).
Princeton Council meets Monday night, 7 p.m.
The county will use about $59,994 in Homeland Security grant funds to purchase the kiosks for residents to use in power outages.
The initiative comes after Princeton learned it has the legal standing to institute a fee on shopping bags at grocery stores.
The issue comes up following a New York Times story about abuses.
Residents should take precautions to avoid doing strenuous activities outside.
The same judge who ruled Morristown Hospital was substantially for-profit will rule on the Princeton case.