| Allied Signal Aerospace Company Macintosh Users Group: Torrance, CA. Offers information on membership and meetings. |
| ASP Developers' Special Interest Group: ASP user group in Los Angeles, California. |
| CLUG: Cerritos Linux Users Group. |
| CVMUG: Simi Valley, CA. Bookstore, calendar, links, meeting, message board, news, reviews, and tutorials. |
| HIDACC Apple Computer Club: Lancaster, CA. Includes newsletter, meeting schedule, software library, and member resources. |
| Los Angeles Java Users' Group (LAJUG): Includes meeting history, directions, mailing list signup, and job listings. |
| Los Angeles Linux User Groups: Umbrella site for all Los Angeles Linux User groups. Links and information about upcoming events. |
| Los Angeles Macintosh Group: Community overview, including forum access. |
| Los Angeles Palm/Portable Users Group: Meeting notes and mailing list. |
| Los Angeles Perl Mongers: user group for the Perl programming language |
| LULA: Linux Users of Los Angeles. |
| MacValley Users Group: Northridge, CA. Offers information on meetings, becoming a member, links, and hands-on seminars. |
| Raytheon/Hughes Mac Users Group: A corporate Yahoo users group with message board and mailing list. |
| San Gabriel Valley Mac Users Group: Pasadena, CA. Includes mailing lists, special interest groups, links, and membership information |
| SGVLUG: San Gabriel Valley Linux Users Group (Altadena) |
| Simi-Conejo Linux User's Group: Linux Users Group for the Simi and Conejo Valleys in Southern California. |
| Southern California Macintosh Owners/Users Group: SMOG offers meeting minutes and schedules, membership information, and useful links. |
| Southern California Wireless Users Group: Wireless users group in California, USA, with a focus on data communications using wireless technology. Contact and meeting information, streaming video archive of meetings and presentations. |
| Thousand Oaks Personal Computer Club: This California, USA, based club is open to all people, young and old, from beginners to advanced. Meeting information and contact details. |
| USCLUG: University of Southern California Linux Users Group. |
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