Linda Kabot was arrested on Labor Day weekend 2009 in Westhampton Beach.
She was cleared Friday of a misdemeanor charge of DWI as well as a lesser charge of driving while ability impaired.
The 43-year-old politician was in the middle of a re-election campaign when she was arrested. She subsequently lost. Her attorney argued she was the victim of a set-up by political opponents.
If convicted, Kabot had faced up to a year in jail and up to a $1,000 fine.
She declined to comment on any future political aspirations.