Aim: It was aimed to evaluate the demographic characteristics, clinical and laboratory findings, diabetic ketoacidosis (DKA) status at the time of admission and the treatments in patients with Type 1 Diabetes Mellitus (DM) in and around Çanakkale. Material and Methods: The files of 165 DM patients, aged 0-18 years, who applied to Çanakkale Onsekiz Mart University Medical Faculty Hospital Pediatrics Clinic between 01.04.2011-01.04.2019 at least once, were retrospectively reviewed. 73 patients, including 68 patients with incomplete file records, 4 patients with Type 2 DM, 1 patient diagnosed with Adult Type Diabetes in the Youth (MODY), were excluded, 92 patients were included in the study. Results: 54.35% of our cases were girls, mean age at diagnosis was 7.6 ± 3.9 years. The seasons with the most frequent diagnosis were autumn (32.6%) and winter (30.43%). 52.17% of the cases resided within 0-50 km of the city center, 42.39% within 50-100 km, 3.27% within 100-150 km and 2.17% further than 150 km. When we classified our patients who presented with diabetic ketoacidosis as mild, moderate and severe DKA and compared the time to exit from DKA according to the protocols applied in their treatment, we found that the patients who were applied the International Child and Adolescent Diabetes Association (ISPAD) 2018 protocol were removed from DKA in a shorter time. Conclusion: Since acute complications such as DKA, hyperglycemia and chronic complications such as retinopathy, nephropathy, neuropathy, and atherosclerosis can be seen in patients with type 1 DM, diagnosis and follow-up are important. Investigation of the regional characteristics of the disease is guiding in terms of genetic and environmental factors that have an important place in etiology. Our study is one of the first studies investigating the cases followed up with the diagnosis of Type 1 DM in the childhood age group in the South Marmara region. Our findings are consistent with the results of similar studies and the literature.