Objectives: The objectives of this research were to examine the average length of hospitalization in patients undergoing operative treatment of lower leg fractures at the Dubrava Clinical Hospital, at the Department of Orthopedics and Traumatology from 2012 to 2022, and to examine whether there was a difference in the length of hospitalization with regard to sex and age. Study design: Cross-sectional study with historical data Respondents and methods: The research included 1,034 patients undergoing operative treatment of lower leg fractures from 2012 to 2022. A retrospective analysis of the data from the hospital information system was carried out. The analyzed variables were age, sex, type of fracture and length of hospitalization. Patients with missing data and patients who underwent another operation in addition to lower leg surgery were excluded from the study. Results: In relation to sex, 552 (53.4%) patients were male and 482 (46.6%) were female. The average length of hospitalization of all patients was 11.1 days. Male patients were hospitalized longer than female patients, but this difference is not statistically significant. The median age of the patients was 54 (interquartile range from 41 to 64 years) in the range from 18 to 90 years. A statistically significant positive correlation between the patient’s age and the length of hospitalization was demonstrated (Spearman’s rank correlation coefficient Rho = 0.239, P < 0.01). The most common diagnosis by age group and sex was S82.7, that is, multiple fractures of the lower leg. Conclusion: The average length of hospitalization in patients undergoing surgical treatment of lower leg fractures was 11.1 days. No statistically significant differences were recorded in the length of hospitalization with regard to sex. A statistically significant correlation between the patient’s age and the length of hospitalization has been proved.