Technological advancements, unbalanced nutrition, sedentary life style, are important factors in obesity. Obesity-inflammation relationis beingexamined. In this study, the relationships among new generation inflammatory markers in children with normal body mass index (C) as well as obese (OB), morbid obese (MO) children and those with metabolic syndrome (MetS) were investigated. Materials and Methods: A total of 172 children participated in the study.Group 1 comprised children with normal body-mass index (control group) (C). Obese (OB) children were in Group 2, MO children constituted Group 3 and Group 4 included MO children with MetS. The number of cases were 37, 34, 51 and 50 in groups 1, 2, 3 and 4, respectively. Anthropometric measurements were recorded. Serum spexin, adropin, adipolipin, fibroblast growth factor-21 and fetuin-A levels were determined. Statistical analyses were performed. Result: Spexin and adipolin levels were significantly lower in obese groups than C group (p<0.05). Although adropin and FGF-21 levels did not differ significantly between groups, levels were lower in OB, MO, and MetS groups than C group.There were no significant differences among fetuin-A levels of the groups. Correlations between spexin and adipolin were the highest. These cytokines were negatively correlated with obesity parameters. The correlations between these cytokines were weakened from C group to MetS group. Conclusion: Decreasing spexin and adipolin levels in accordance with increasing obesity degrees and weakening of the correlation between these cytokines in MO group compared to C group may be helpful during the further investigation of obesity.