Background: Community-based participatory research (CBPR) is increasingly used by community and academic partners to examine health inequities and promote health equity in communities. Despite increasing numbers of CBPR partnerships, there is a lack of consensus in the field regarding what defines partnership success and how to measure factors contributing to success in long-standing CBPR partnerships. Aims: To identify indicators and measures of success in long-standing CBPR partnerships as part of a larger study whose aim is to develop and validate an instrument measuring success across CBPR partnerships. Methods: The Joanna Briggs Institute framework and Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guided searches of three databases (PubMed, CINAHL, Scopus) for articles published between 2007 and 2017 and evaluating success in CBPR partnerships existing longer than 4 years. Results: Twenty-six articles met search criteria. We identified 3 key domains and 7 subdomains with 28 underlying indicators of success. Six partnerships developed or used instruments to measure their success; only one included reliability or validity data. Discussion: CBPR partnerships reported numerous intersecting partner, partnership, and outcome indicators important for success. These results, along with data from key informant interviews with community and academic partners and advisement from a national panel of CBPR experts, will inform development of items for an instrument measuring CBPR partnership success. Conclusion: The development of a validated instrument measuring indicators of success will allow long-standing CBPR partnerships to evaluate their work toward achieving health equity and provide a tool for newly forming CBPR partnerships aiming to achieve long-term success.