ABSTRACT Purpose To create medical school service regions and examine national in-region graduate retention patterns across the medical education continuum and into professional practice as one approach to advancing social accountability in medical education. Methods Medical school service regions were created in Canada using publicly available data and mapped using Geographic Information System (GIS) software. Population size and density for each service region were calculated using census data. Retrospective data of medical graduates who completed their medical degrees between 2001–2015 (n = 19,971) were obtained from a centralized data repository and used to analyze in-region retention rates by medical specialty across the training continuum and five years into professional practice. Results Spatial inequities were observed across medical school service regions. Graduate retention patterns also varied across service region groups and medical specialties. Quebec (86.5%) and Ontario (80.4%) had above-average retention rates across the medical education continuum. Family medicine had the highest retention rates from undergraduate to postgraduate training (81.9%), while psychiatry had the highest retention rate across the training continuum and into professional practice (71.2%). The Alberta and British Columbia service region group demonstrated high retention rates across the training continuum and into professional practice and medical specialties, except for retention from undergraduate to postgraduate medical education. Conclusion This study highlights the importance of considering both medical specialty and practice location of graduates when planning and retaining the physician workforce. The observed retention patterns among graduates are a critical aspect of addressing societal needs and represent an intermediate step towards achieving health equity. Furthermore, graduate retention patterns serve as an outcome measure for schools to demonstrate their commitment to social accountability. Tracking and monitoring graduate outcomes may lead schools to actively collaborate with government agencies responsible for healthcare policy, which may ultimately improve physician workforce planning and promote more equitable healthcare access.