The prevalence of diabetes has increased in adolescents. Diabetic adolescents need ongoing support from their families, and the family plays an important role in the management of the disorder. This study aimed to identify the relationship between family support and resilience in adolescents with Type 1 Diabetes Mellitus (T1DM). Quantitative data analysis was conducted using simple logistic regression. Meanwhile, qualitative data were analyzed using content analysis. The results show that the median duration of a T1DM diagnosis was 4 years, which was dominated by early adolescents in the study group (41.9%); the mean resilience score was 67.95 (range 0–100) with 53.5% of the participants had low resilience, and 55.8% of the respondents received a high level of family support. Logistic regression test results indicate that significant family support is associated with resilience.