JSI views community knowledge and input as a critical and often underused component of strong health care systems. To improve immunization in the challenging UI-FHS regions, JSI brought community members into facility- and woreda-level immunization activities in Ethiopia, and utilized their knowledge of catchment areas and populations to target and strengthen immunization planning and implementation. A partnership between communities and the health system increases the identification and reach of routine immunization services for zero-dose and under-immunized children. This brief, written by JSI in 2021, provides recommendations on opportunities to engage communities in the immunization program in order to improve equitable service delivery for immunization.