This study aims to profile the critical and creative thinking skills of high school students in science. The research was employed a quantitative descriptive method. The participants involved in the research were consisted of 108 students for critical thinking skill measurement and 129 students for creative thinking skill assessment. The sample was determined by random cluster sampling. The students' critical thinking skills was measured using 5 essay questions which assess aspects of reasoning, inferencing, situations, clarity, and overviewing. In addition, the 4 essay questions were used to assess students' creative thinking skills on aspect of fluency, flexibility, originality, and elaboration. The results of the findings revealed that students' critical and creative thinking skills are still in the low category, indicating the lack of students understanding in science concepts.