Edward Furlong -- I'm Single Again ... Hey, Ladies, Wanna Date?

Even eHarmony might have trouble with this one ... Edward Furlong -- who has a standing jail cell -- is now legally single and ready to mingle.

Furlong -- whose estranged wife, Rachael Kneeland, filed for divorce back in 2009 -- got the official court ruling this week that restores each of them to single status. They're still wrangling over money issues.

Furlong has a rich history of violating restraining orders and multiple arrests for domestic violence.

He also has an affinity for seafood ... he was arrested for throwing lobsters out of a grocery store tank because he wanted to liberate them.