Belmont Democrat Will Brownsberger won the Second Suffolk and Middlesex state senate race over Watertown Republican Steven Aylward Tuesday night, according to unofficial election results.
Brownsberger, who was elected to the state senate in January 2012, netted 15,966 votes to Aylward's 4,079, or 20 percent of the vote, according to results on the City of Boston website.
In Watertown, Brownsberger picked up 11,021 votes, with Aylward getting 4,199.
The district includes all of Belmont, Watertown and part of Boston, including the Back Bay, the Fenway, Kenmore Square, Allston and Brighton.
"I'm very grateful for the overwhelming support that voters gave me," he said. "I'm looking forward to diligently serving the community."
Aylward is chairman of the Watertown Republican Town Committee and is a former member of the School Committee.