Introduction: in Western societies, social networks are prominent sources of information and entertainment, widely accessed due to internet availability. While social networks offer health benefits, their impact varies across generations and populations. Concerns arise about their influence on mental health, with potential hindrance to social relationships. Social networks are recognized as contributors to eating disorders, influencing nutritional behaviors and impacting self-perception negatively. For this, the objective of present study was determining the association between the risk of eating disorders (ED) and the use of social networks in young adults in the Araucanía Region of Chile. Methods: a descriptive cross-sectional study was conducted on the young adult population. The subjects were recruited online through crucial social networks between November and December 2021. A self-reported online form was administered, asking for sociodemographic variables, social network use, and risk of eating disorders. The EAT-26 was applied for the latter variable. To determine the association between variables, each condition was dichotomized against the presence or absence of ED risk. Results: a total of 370 responses were collected, representing females (62.7 %) primarily from the 20-28 age group (79.5 %) and from the university student group (54.9 %); 12.9 % of the sample were at risk of ED. The variables associated with a higher risk of an eating disorder were being female (p = 0.001), preference for Twitter (p = 0.017), interest in food influencers (p = 0.008), and perceived frequency of advertising (p = 0.007). Conclusion: in this sample, there is an association between the use of social networks and the risk of ED, but this depends mainly on the social network used and exposure/preference of food-related content.