Among the 73 cities or towns holding elections Tuesday are a handful of competitive mayoral races, two of which include sitting lawmakers.
In Lynn, Sen. Thomas McGee, a Democrat who has represented Lynn in the Senate since 2003, faces off against two-term Lynn Mayor Judith Flanagan Kennedy, a Republican. McGee overwhelmed Kennedy with nearly 72 percent of the vote in September's two-way preliminary election.
If McGee is elected and resigns his Senate seat, it would trigger a fourth special election in the Senate this session.
South of Boston, in Attleboro, Democratic Rep. Paul Heroux is challenging incumbent Republican Mayor Kevin Dumas. Heroux topped the ticket in Attleboro's preliminary election in September, earning 2,217 votes to Dumas' 1,966.
If Heroux is elected mayor and gives up his House seat, the House would have to hold a third special election of the session to fill his seat.
Dumas, a Republican, has served as mayor since 2003. Heroux, a Democrat, was elected to the House in 2012.
In Lawrence, voters are faced with a rematch of the 2013 election, in which Daniel Rivera defeated William Lantigua by 81 votes. Lantigua, the former mayor and state representative, left Lawrence after his defeat but has returned from political exile to make a run for his old job.
And in Framingham, voters will elect their first mayor. Framingham voted on April 4 by a narrow margin to turn the state's most populous town, with over 68,300 residents, into its newest city.
That contest will be decided between former state representative and selectman John Stefanini and Yvonne Spicer, an educator, town meeting member and member of the Massachusetts STEM Advisory Council and the Massachusetts Business Roundtable.
Polling location hours vary, check with local clerks offices.