OBJECTIVE - This study examines the prevalence of specific weight control practices/ disordered eating behaviors and associations with sociodemographic characteristics, BMI and weight perceptions, family functioning, and metabolic control among adolescent females and males with type 1 diabetes. RESEARCH DESIGN AND METHODS - The study population included 70 adolescent females and 73 adolescent males with type 1 diabetes who completed the AHEAD (Assessing Health and Eating among Adolescents with Diabetes) survey. Data on BMI and glycosylated hemoglobin (HbA1c) were drawn from medical records. RESULTS - Unhealthy weight control practices were reported by 37.9% of the females and by 15.9% of the males. Among the females, 10.3% reported skipping insulin and 7.4% reported taking less insulin to control their weight. Only one male reported doing either of these behaviors. Weight control/disordered eating behaviors were not associated with age, parental level of education, family structure, or race/ethnicity. Higher levels of weight dissatisfaction tended to be associated with unhealthy weight control/disordered eating; associations with BMI were inconsistent. Family cohesion was negatively associated with disordered eating among females (r = -0.52; P < 0.001) and males (r = -0.41; P < 0.001), but correlations with other measures of family environment (control, independence, and responsibility for diabetes management) were not significant. Correlations between disordered eating and HbA1c levels were significant among females (r = 0.33; P < 0.01) and males (r = 0.26; P < 0.05). CONCLUSIONS - Special attention is needed for youth with weight concerns and those from less cohesive families to assist in the development of healthy diabetes management behaviors.