The Eating Disorder Examination Questionnaire (EDE-Q), originally validated in English-speaking women, has become a widely used tool for assessing eating pathology. However, its original factor structure has often failed to replicate in diverse populations. This study aimed to examine the factor structure and assess the measurement invariance of the EDE-Q 6.0 in a representative sample of young men and women in Lithuania. The study included 800 participants aged 18–30 years, representing a demographically diverse sample of young adults in Lithuania. Confirmatory factor analysis (CFA) was conducted to validate the structure of the Eating Disorder Examination Questionnaire (EDE-Q 6.0) and establish a configural model. Measurement invariance was assessed across sexes. Convergent validity was evaluated using the Level of Personality Functioning Scale—Brief Form 2.0 and the Patient Health Questionnaire-4. The original four-factor structure of the EDE-Q 6.0 was not supported. Instead, CFA indicated that a three-factor, seven-item model provided the best fit to the data (EDE-Q 7). The identified factors were Dietary Restraint, Shape/Weight Overvaluation, and Body Dissatisfaction. This model demonstrated excellent fit indices and measurement invariance across sexes. However, women reported significantly higher scores on all subscales compared to men. EDE-Q 7 exhibited adequate convergent validity, correlating with measures of personality functioning, anxiety, and depression. The three-factor, 7-item measure is a brief, valid, and reliable measure of eating disorder psychopathology for Lithuanian young adults. The study tested how well the Eating Disorder Examination Questionnaire (EDE-Q 6.0) works for young adults in Lithuania. The questionnaire was originally developed in English, but past studies have shown that its structure doesn’t always fit well in different populations. The study included 800 men and women aged 18–30 from the community. Using statistical analyses, the researchers found that the original four-part structure of the questionnaire did not fit the Lithuanian data. Instead, a shorter version with seven questions grouped into three factors—Dietary Restraint, Shape/Weight Overvaluation, and Body Dissatisfaction—worked best. This new version, called EDE-Q 7, was consistent for both men and women, though women tended to score higher on all scales. The shorter questionnaire also showed good validity, meaning that higher scores were linked with more difficulties in personality functioning, anxiety, and depression. To conclude: EDE-Q 7 is a brief, reliable, and valid tool for measuring eating disorder symptoms in Lithuanian young adults.