Sexual orientation and gender identity (SOGI)-diverse patients are marginalized and poorly cared for in the emergency department, yet well-designed educational interventions to meet this gap are lacking. We developed, implemented, and assessed a novel multi-modal SOGI curriculum on health and cultural humility for emergency medicine physician trainees. We conducted a prospective, single-arm evaluation of our educational intervention. A convenience sample of emergency medicine resident physicians (n = 21) participated in the facilitated curriculum including didactic and clinical simulation components. Participants completed a pre- and post-curriculum evaluation that assessed clinical skills, preparedness, attitudinal awareness, and basic knowledge in caring for SOGI-diverse patients. The content of the module was based on a scoping literature review and national needs assessment of Canadian emergency physicians, educators, and trainees along with expert collaborator and input from patient/community partners. The curriculum included a facilitated pre-brief, didactic presentation, clinical simulation modules, and a structured de-brief. Participant clinical skills were evaluated before and after the educational intervention. Our primary outcome was change in clinical preparedness, attitudinal awareness, and basic knowledge in caring for SOGI-diverse patients pre- and post-intervention. Our patient-centered, targeted emergency medicine SOGI health and cultural humility training resulted in a significant improvement in resident self-rated clinical preparedness, attitudes, and knowledge in caring for SOGI-diverse patients. This training was valued by participants. We have designed an effective, patient-centered curriculum in health and cultural humility for SOGI-diverse patients in EM. Other programs can consider using this model and developed resources in their jurisdictions to enhance provider capacities to care for this marginalized group.