The concentrations of zinc in blood serum of 82 (28 male + 54 female) persons living in the Belsin Region, Kayseri, were determined by flame-atomic absorption spectrometry. The Belsin Region near a large industrial zone, named Kayseri Organize Sanayi Bolgesi, has poor social and economic conditions. The mean concentration of zinc was found in the upper limits of the world values (0.70 +/- 0.27 mg/l). The influence of variables such as sex, age groups, number of pregnancy per women, smoking habits on the serum zinc levels was also examined. None of the correlation coefficients between the serum zinc level and following variables were significant: sex, age, number of pregnancies, and smoking habits. The results of the present study were found to be in agreement with earlier works reported in the literature.