Africa
Cape Town Java User Group (CTJUG), Durban Java Users Group (DJUG), Ethiopian Java User Group (EthioJUG)
Asia
Aurangabad Java Group, Bangladesh Java Users Group (BDJUG), Beijing Java User Group, Calcutta Java User Group (CALJUG), China Java Users Group, Cyber Kings - Java Users' Group, HKJava.com, Hong Kong Java User Group, JUGga, Server-Side India
Europe
Belgian Java User Group, Irish Java User Group (IJUG), Java Special Interest Group (JSIG), Java User Group Stuttgart (JUGS), Java User Group Switzerland (JUGS)
Middle East
Alexandria Java User Group (AlexJUG), Iranian Enterprise Java Users' Group (IEJUG), Israeli Java User Group
Oceania
Australian Java Users' Group (AJUG), Canberra Java Users Group, Sydney Java Users Group (SJUG)
Game Developers Java Users Group (GameJUG)
Mailing lists signup, membership information, resources, and links.
Java User Groups Worldwide
Sun's JUG page includes index of groups worldwide as well as a finder program.