Galanin (GAL) is a neuropeptide which that is expressed in a tissue specific manner and has been implicated in adult onset diseases such as obesity and lipid and glucose abnormalities. The objective of this study was to investigate the serum levels of GAL and their relationship with obesity in adults. This cross-sectional study included both men and women (total n=261; n=109 women and n=152 men) who applied to the Sleep Disorder Center of Medicine Faculty of Süleyman Demirel University and Sleep Laboratory of Chest Disease Policlinic of Isparta Gülkent Hospital. According to their body mass index (BMI), subjects were grouped into into four categories: normal body weight (<24.9 kg/m2), overweight (25–29,9 kg/m2), obese group 30–39,9 kg/m2) and morbid obese (? 40 kg/m2). Plasma samples from subjects were assayed for each plasma parameter using commercially available analytic systems. The results of this study include that serum GAL levels showed a significantly positive correlation with body mass index (BMI) in both genders. In morbidly obese individuals, galanin levels were significantly higher when compared to other groups. Serum GAL levels were olso positively correlated with C-reactive protein (CRP). In present study, we found that there is a significant positive correlation of BMI with CRP. Our results indicate that inappropriate plasma concentrations of galanin in obese subjets may be a consequence of their weight status, or could be one of many factors involved in the pathogenesis of obesity. Obesity is associated with elevated levels of CRP. The positive associations of obesity with elevated CRP levels suggest the importance of reducing obesity to prevent elevations in CRP levels.