Our History 

Spinsters of San Francisco (SOSF) is a social nonprofit of young professional women making a positive difference in the Bay Area through volunteering and fundraising. We believe that when a diverse and close group of ambitious women come together, we can accomplish great things for our community.  

The group was founded on November 6, 1929, in a San Francisco that had yet to see the Golden Gate Bridge and many of the other landmarks we cherish today. Inspired by the Bachelors of Los Angeles, founded in 1905, a small circle of women set out to create a space for single women across the Bay Area to connect and build lasting friendships. Patricia Tobin (Mrs. Sheldon Cooper) hosted that first gathering in the ballroom of her grandparents' home, the de Young house, at 1919 California Street. The first president was Harriet Brownell, who presided over the original membership of 35 young women.

90+ Years Later

SOSF aspires to unite remarkable women in the San Francisco Bay Area through an active social network where members develop meaningful friendships, support each other professionally, and make a lasting positive impact on our community.