Background. Poor glycemic control has been considered as one of risk factors for dyslipidemia and cardiovascular disease in patients with type 1 diabetes (T1D). However, there is limited data on the relationship between glycemic control and dyslipidemia in patients with T1D. We aimed to investigate the incidence of dyslipidemia and its association with glycemic control in adolescents and young adults with T1D. Methods. This cross-sectional study included 21 Korean patients T1D aged 11–25 years. Fourteen (67%) patients were female and median duration of diabetes was 8.5 years (range: 0.2–15.6). Correlations between glycosylated hemoglobin (HbA1c) and lipid profiles parameters (total cholesterol [TC]; low-density lipoprotein cholesterol [LDL-C]; high-density lipoprotein cholesterol [HDL-C]; and triglyceride [TG]) were determined by linear regression analysis. In addition, we compared the lipid profile parameters of patients with dyslipidemia and those of patients without dyslipidemia. Results. Of 21 patients with T1D, 6 (28.6%) had dyslipidemia. Patients with dyslipidemia were more likely to have the higher median values of HbA1c than those without dyslipidemia (10.6% [range: 7.5–13.3] vs. 7.8% [range: 6.6–9.9]; P = 0.01). There were no statistically significant differences between both groups regarding age, duration of illness, body mass index standard deviation score, microalbuminuria, and 25-hydroxy vitamin D. HbA1c level has positive and significant correlations with TC ( P = 0.009; R2= 0.306) and TG ( P = 0.003; R2= 0.386). There was a trend towards a positive correlation between HbA1c and LDL-C, but it did not reach the statistical significance ( P = 0.09; R2= 0.150). Conclusions. These results suggest that a significant number of adolescents and young adults with T1D are at risk of developing dyslipidemia. We found a correlation between poor glycemic control and poor lipid profiles in T1D patients.