This research aims to examine the widely accepted paradigm that proficiency in mathematics significantly influences the academic success of Civil Engineering students. Using data from 119 students of the 2018 and 2019 cohorts at Universitas Mercu Buana, the study analyzes the correlation between their performance in Mathematics courses (Mathematics 1, 2, and 3) and their academic success, as measured by timely graduation and GPA. The data were processed using the Spearman correlation method, given its non-normal distribution as determined by Kolmogorov-Smirnov and Shapiro-Wilk tests. The results indicate a significant positive correlation (r = 0.313, p = 0.001) between mathematical performance and academic success, with students achieving higher mathematics scores more likely to graduate on time. These findings suggest that while mathematical ability is a critical factor in academic success, other elements such as motivation, teaching methods, and external support should also be considered in improving student outcomes.