'Jackass' Star Chris Pontius -- DIVORCE FINALIZED ... 'Party Boy' Back on the Market

It took four years .... but "Jackass" star Chris Pontius -- aka Party Boy -- is finally free to throw on his g-string and grind on whoever he wants (guilt-free) 'cause a judge just finalized his divorce, TMZ has learned.

We broke the story ... Chris was hit with divorce papers in 2011, two years after he had separated from his wife Claire Nolan. The two had married back in 2004.

Math Fact -- they had been separated almost as long as they had been married.

As far as assets go, the couple had two homes -- one in the Hollywood Hills (he got that) and one in Ireland (she got that) ... this, according to the judgment, filed in L.A. County Superior Court and obtained by TMZ.

As far as the other stuff goes ...

Chris got ... his 2012 Toyota FJ Cruiser, his royalties from "Jackass" and "Wildboyz," everything in their American investment accounts, and an unknown amount of credit card debt.

Claire got ... a vintage 1965 International Scout (see below), her engagement ring, a check from Chris for $200,000 dollars and whatever's left in their Irish bank account.

We reached out to Pontius for comment -- so far, no word back.