Accumulating evidence suggests that overt hypothyroidism is associated with accelerated atherosclerosis, thereby increasing the risk for major cardiovascular events. The present study aimed to investigate the associations between serum catestatin levels and advanced glycation end-products (AGEs), indicators of vascular health, in individuals with Hashimoto’s thyroiditis compared to healthy controls. A total of 100 female patients with Hashimoto’s thyroiditis and 100 age-matched healthy controls were included in the study. Serum catestatin levels (10.2 (6.5–15.8) vs. 6.4 (4.1–9.3) ng/mL, p p p p p = 0.005 and r = 0.229, p = 0.024, respectively). All of these associations were confirmed through multivariate analyses. The present analysis indicates that catestatin might be implicated in cardiovascular consequences of Hashimoto’s thyroiditis. However, future research should focus on longitudinal studies to explore if the causal relationship exists.