ABSTRACT The Network of the National Library of Medicine Evaluation Center (NEC) will develop and enhance best-practice evaluation strategies and resources for the benefit of the Network of the National Library of Medicine (NNLM). The NEC will collaborate with NNLM and Regional Medical Libraries (RMLs) and Offices to develop standardized processes and robust integrated visualization and reporting tools and data for evaluation and communication of program activities and outcomes. We will assess the efficacy and outcomes of NNLM activities, services, and resources, with a special focus on understanding its impact on persons who are underrepresented or experience health disparities. Community and capacity building are made a priority through workforce and network development activities and resources directed to the National Library of Medicine (NLM), Regional Medical Libraries (RMLs), Offices, and Centers (ROCs), and network members. We will work with the NLM Office of Engagement and Training (OET) and the NNLM Steering Committee (SC) to align this proposed work with the NLM Strategic Plan and with emerging strategic priorities during the funding period. Through this opportunity, we will support and advance NNLM’s mission “to advance the progress of medicine and improve the public's health by providing U.S. researchers, health professionals, public health workforce, educators, and the public with equal access to biomedical and health information resources and data.” We will accomplish this by leveraging the unique culture, strengths, and capabilities of our team; empowerment approaches to build capacity and community; integration of open processes and access, and a keen focus on understanding and communicating outcomes and impact.