Background and Aim: This study was designed to compare self-control and early maladaptive schemas in athletes based on sports and demographic characteristics. Materials and Methods: This study's statistical population included all male and female swimming athletes in the country. Of them, 256 swimming athletes from clubs in various cities of Iran were selected using an available sampling method. The research utilized Yang's schema questionnaire (2005) and a self-control questionnaire. Results: The analysis of variance revealed no significant differences between women and men in the schemas of entitlement/secretary and emotional inhibition (p < 0. 05). However, significant differences were found in the overall schema and the following schemas: abandonment/instability, distrust/misbehavior, emotional deprivation, deficiency/shame, social isolation/alienation, autonomy, impaired performance (dependency/incompetence, vulnerability to harm/disease, untransformed self, failure), impaired limitations (insufficient self-restraint and self-discipline), other orientation (obedience, sacrifice), and stubborn standards/extreme fault-finding (p < 0. 05). Furthermore, substantial differences were observed in types of early maladaptive schemas, except forautonomy and failure, among swimmers at different levels of sports performance. There were also significant differences in schemas and self-control based on sports levels, employment, level of medals won, position, gender, education, and marital status (p< 0. 01). Conclusion: Self-control and early maladaptive schemas in swimming athletes can be differentiated by gender, sports performance levels, level of medals won, position, employment, education, and marital status.