Abstract Introduction: The lack of representation of minoritized and marginalized (MaM) populations in Clinical Trials (CTs) has been noted as one of the key factors that contribute to cancer health disparities. The challenges of CT diversity are multifactorial, including barriers at the personal, provider, health systems and protocol levels. Guided by a vision of developing and implementing inclusive CTs that address the priorities identified by our communities, we created a Community Research Registry (CoRR) with three primary aims: 1. Maintaining a CoRR database of participants who may be eligible for participation in future CTs; 2. Using the database, facilitate matching of MaM populations to Clinical Trials; and 3. Facilitating access of MaM populations to CTs. Methodology: The Mayo Clinic CoRR is IRB-approved and was implemented in 2022 through bidirectional engagement of communities, partnership with community leaders to foster community input, dissemination of CT information to high-risk communities, and use of evidence-based education materials for community outreach. Participants are recruited in MaM communities (including clinics, churches, health events) and through effective use of social media. Organized events for recruitment include: 1. CT education; 2. provision of culturally tailored CT educational materials and T-shirts; and 3. data collection from those who consent to be part of the registry. The inclusion criteria for the registry are adults and ability to read and write in English or Spanish. Informed consent is obtained prior to completion of the registry form and participants receive $10 incentive. The data is collected using REDCap, and includes name and contact information of participants, demographic information, chronic disease status and explicit consent to be contacted for future research studies (with option to state type of study). New Unpublished Data: Within 7 months of CoRR implementation, 184 MaM participants signed up with 92% Black (including 10% African immigrants), 7% Hispanic, 69% female, median age of 64 years, 24% rural residents, and most of the participants had high school level education. Over 30% of participants reported medical history of hypertension, high cholesterol, arthritis and/or diabetes. 8% reported cancer. Approved investigators (with appropriate community engagement training) have direct access to de-identified CoRR information though Tableau for the purpose of estimating participants for their study. Tableau has been found to be effective for investigators to explore the database for CT/research match. All requests for participants matching are approved by a CoRR Board that includes community representatives, prior to matching. CoRR CT matching is now in its pilot phase, with Mayo Clinic studies identified for matching. Conclusion: The feasibility of the CT CoRR has been established, and has led to over 20 CoRR Champion organizations, including churches, sororities, fraternities, and the American Legion Post. Citation Format: Folakemi T. Odedina, Floyd Willis, Jennifer Crook, Emelina Asto-Flores, Kim Barbel Johnson, Chad Workman, Mayo Clinic Comprehensive Cancer Center CommunityOutreach and Engagement. Increasing clinical trials diversity through Community Research Registry (CoRR): The Community Champions for clinical trials program [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 2 (Clinical Trials and Late-Breaking Research); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(8_Suppl):Abstract nr LB112.