Voters in parts of Boston will go to the polls for the fifth time in six months today: Another special election is on the Sept. 10 ballot, with this one filling the House seat left vacant by Linda Dorcena Forry when she won a state Senate seat.

Three candidates are running to succeed her: Dan Cullinane, a Dorchester Democrat, and two independents, Lincoln Larmond of Mattapan and Edmond Romulus of Milton.

The 12th Suffolk House District, which heavily favors Democratic candidates, includes parts of Dorchester, Mattapan, Hyde Park and two precincts in Milton. The seat was once held by former House Speaker Thomas Finneran, a Mattapan Democrat.

Cullinane won a low-turnout primary on Sept. 13, triumphing over fellow Democrats Stephanie Everett and Mary Tuitt. In a district that has over 21,000 voters, under 2,300 voters turned out in that election. Cullinane picked up 1,373 votes, while Everett won 494 votes, Tuitt had 324 votes and Ruthella Logan-Cruz, a write-in candidate, garnered 59 votes. Republicans did not field a candidate.

With Cullinane as the Democratic nominee, he has picked up the endorsements of Gov. Deval Patrick, U.S. Sen. Ed Markey and state Sen. Dorcena Forry. The state senator is married to Reporter editor Bill Forry.

Cullinane, who has worked on several campaigns, including Forry’s Senate campaign and Attorney General Martha Coakley’s unsuccessful 2009 U.S. Senate run. His voting record, according to records at the city’s Elections Department, includes 27 elections, from a presidential primary in 2004 to the multiple elections this year.

Larmond has voted in 17 elections, starting with a state election in November 2000. He has voted as a Democrat in some state primaries and as a Republican in the 2008 presidential primary.

Romulus has voted in four elections, starting in Sept. 2010, pulling a Democratic ballot. He also pulled a Democratic ballot in the special state primary on Aug. 13.