Lamont leads Republican Bob Stefanowski 57% - 40% among likely voters.
A total of 84% of likely voters say their mind is made up about who they will vote for, with only 15% saying they may change their mind before Election Day.
Sen. Richard Blumenthal also leads his Republican challenger Leora Levy by 57 to 40. Similar to the governor's race, 89% say they have decided who they will vote for.
The poll also found that women have helped boost the Democratic candidates
Other findings found that inflation ranks first as the most urgent issue facing Connecticut, followed by taxes.
Voters also gave positive job approval ratings to Lamont, Blumenthal and Sen. Chris Murphy.