Invasive aspergillosis is a major cause of morbidity and mortality in hematopoietic stem cell transplant and solid organ transplant recipients. The introduction of new noninvasive tests, combined with more effective and better-tolerated antifungal agents, has decreased the mortality rates associated with invasive aspergillosis. This review provides an update on the epidemiology of this disease in transplant patients, the associated risk factors that have been identified in each transplant population, and the current approaches for diagnosis, management, and prevention of invasive aspergillosis.