Most theories emphasize the role of sociocultural factors in the etiology of eating disorders (EDs). This article uses a broad search strategy to identify current etiologic studies. Women with an ED outnumber men in each diagnosis, but gender differences vary by diagnosis. Men were underrepresented in study samples, and information about variable risk factors in men is sparse. Findings suggest transdiagnostic risk factors and disorder-specific risk factors. Extracting data from population-based registers represents a major advance. Novel analytic approaches suggest complex pathways to ED. Although used in several studies, reliance on a transdiagnostic ED category (vs diagnosis-specific groupings) is premature.