The purpose of this study is to examine the female sex workers’ (FSWs) community organization (CO) membership, their financial and social protection security, and the relationship between these factors among FSWs in India. Data from 4098 FSWs collected under the Avahan-III baseline evaluation survey—2015 in 5 high HIV prevalence states (Maharashtra, Tamil Nadu, Karnataka, Telangana, and Andhra Pradesh) in India were used here. More than three-fifths (77%) were registered CO members, of whom 79% had been CO members for more than 1 year. The likelihood of having high financial security (19% versus 10%; adjusted odds ratio [AOR]: 1.7; 95% confidence interval [CI]: 1.3-2.1) and social protection security (13% versus 6%; AOR: 1.6; 95% CI: 1.2-2.0) was 2 times higher among FSWs who were CO members compared to those who were not. The study offers important insights into furthering CO membership to address financial and social vulnerability as a path to a sustainable reduction of HIV risk.