In addition to school and family, out-of-school time context can provide important opportunities in the development of children and adolescents. In order to examine the students' use of out-of-school time better, activity diversity, intensity, and profiles should be studied. The aim of this study is to identify different time use profiles among high school students through person-centered cluster analysis as well as variable-centered descriptive statistics. A total of 180 students, 93 female and 87 male, from the tenth and eleventh grades of a public high school in İstanbul participated in the study. A personal information form and a time use questionnaire prepared by the researcher were administered to the students. According to average time use, the first three activities with the highest values in weekly total time were (1) using internet or social media, (2) studying, and (3) watching television. The time that students devote to the activities was related to the day of the week, gender, grade level, academic achievement, and family income. Three different profiles emerged as a result of time use of the students and these profiles differed in terms of gender, grade level, and academic achievement. The results indicate the need for a closer and in-depth examination and evaluation of the out-of-school time context, which plays an important role in the development of students.