| Name: | MIRA |
| Address: | 2868 Forest Hill Blvd., Pacific Grove, CA 93950 USA |
| Contact: | Stewart Hobson |
| Phone: | |
| Email: | |
| URL: | |
| Members: | |
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| Name: | Mount Diablo Astronomical Society |
| Address: | PO Box 4889, Walnut Creek, CA 94596-3754 USA |
| Contact: | James Scala |
| Phone: | (925)283-0398 |
| Email: | jscala2@attbi.com |
| URL: | |
| Members: | 165 members, Star Parties, Monthly speaker meeting |
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| Name: | Mount Diablo Observatory Assoc. |
| Address: | Mt. Diablo State Park, 96 Mitchell Canyon Rd., Clayton, CA 94517 USA |
| Contact: | James Weibert |
| Phone: | 510-227-4463 |
| Email: | bweibert@ccnet.com |
| URL: | |
| Members: | 32 |
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| Name: | Mount Tam Observers |
| Address: | 89 Dominican Dr., San Rafael, CA 94901-1337 USA |
| Contact: | Tinka Ross |
| Phone: | 415-454-4715 |
| Email: | tinka@marin.cc.ca.us |
| URL: | |
| Members: | |
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| Name: | Mount Wilson Observatory Assn. |
| Address: | P.O. Box 70076, Pasadena, CA 91117-7076 USA |
| Contact: | Don Nicholson |
| Phone: | |
| Email: | dnich@alumni.calech.edu |
| URL: | |
| Members: | |
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| Name: | Mountain Skies Astronomical Society |
| Address: | P.O. Box 1169, Lake Arrowhead, CA 92352 USA |
| Contact: | Lorann Parker |
| Phone: | 909-336-1699 |
| Email: | |
| URL: | |
| Members: | 2,311 members |
|
| Name: | Oceanside Photo and Telescope Astronomical Society |
| Address: | 1024 Mission Ave, Oceanside, CA 92054 USA |
| Contact: | John Downs |
| Phone: | 760-722-3348 |
| Email: | opt@optcorp.com |
| URL: | |
| Members: | |
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| Name: | Orange County Astronomers |
| Address: | P. O. Box 1762, Costa Mesa, CA 92628 USA |
| Contact: | Charlie Oostdyk |
| Phone: | 714-751-5381 |
| Email: | charlie@cccd.edu |
| URL: | |
| Members: | 810 members |
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| Name: | Peninsula Astronomical Society |
| Address: | P.O. Box 4542, Mountain View, CA 94040 USA |
| Contact: | William Phelps |
| Phone: | 650-949-7334 |
| Email: | pasinfo@usa.net |
| URL: | |
| Members: | 250 members |
|
| Name: | Polaris Astronomical Society |
| Address: | 4375 Clearwood, Moorpark, CA 93021 USA |
| Contact: | Dave Kingston |
| Phone: | 805-531-8102 |
| Email: | |
| URL: | |
| Members: | 50 members |
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