Although it has always been a required core subject in Bhutanese schools, underachievement in mathematics regularly shows that the requirement has very little impact on students. This study aims to examine the relationship between mathematics performance and metacognitive skills in grade X students. This study used 347 grade X students (M = 162, F = 185) from one of the schools in Sarpang Dzongkhag and a correlational survey design. The level of students' metacognitive skills was evaluated using the modified Metacognitive Awareness Inventory (MAI), whilst their mathematics performance was evaluated using the Mathematics Performance Test (MPT). Students in grade X were found to have high level of metacognitive skills (M= 3.54, SD=.42). While the correlational analysis showed a weak but significant positive correlation (r =.133, p ≤ .05) between students' metacognitive skills and mathematics performance. The outcome also showed that students' metacognitive skills are a statistically significant predictor of their mathematics performance. The findings of the study indicated that metacognition be taken into account to aid students' learning of mathematics.