This new HIP brief describes the evidence on and experience with community group engagement (CGE) interventions that aim to foster healthy sexual and reproductive health (SRH) behaviors. The distinguishing characteristic of CGE interventions from other social and behavior change (SBC) interventions is that they work with and through community groups to influence individual behaviors and/or social norms rather than shifting behavior by targeting individuals alone. Specifically, community support can shift individual behaviors, including contraceptive behaviors, either by changing norms or individual knowledge and attitudes.