The Mailing Address for the San Mateo County Astronomical Society is:


            PO Box 974, Station A

            San Mateo, CA, 94403

​To contact us by email:

To join our Yahoo Group Email list, click HERE.

To find us on Facebook, click HERE.

To request a private Star Party or Astronomy Presentation, email

To find out about Astronomy Events at the College of San Mateo, including Planetarium Shows and special observing events, click HERE.

For general questions, call Ed Pieret, SMCAS Vice-president at (650)862-9602

To receive emails about astronomy lectures and events in the Bay Area, join the BayAstro Yahoo group at