Chartered: 5-2-1953
Sponsor: Walnut Creek
Meetings: 1st Wednesday, 6:00 pm, 2nd,3rd, and 4th Weds.12:00 pm
Location: Lone Tree Golf Course, 4800 Golf Course Road, Antioch
Mailing: P.O. Box 2352, Antioch, CA 94531
Email: siantioch@soroptimist.net
Website:  www.si-antioch.org
Facebook: Soroptimist International of Antioch