Objective: Obesity is a complex disorder involving all ages and socioeconomic groups with its serious social and psychological effects. Current studies show that obesity prevalence is increasing in Turkish population. Our aim in this study was to determine the obesity prevalence and its association with metabolic risk factors in rural and urban areas of Tokat. Material and Methods: This study was conducted in city and county centers and selected villages. Study included 1095 subjects representing 530000 people living in Tokat province. Independent variables were age, marital status, oral contraceptive use, cigarette smoking and alcohol use. Group I consisted of normal subjects (body mass index; BMI <= 24.9 kg/m(2)), group II overweight (BMI 25.0-29.9 kg/m(2)), and group III obese (BMI >= 30 kg/m(2)) subjects. Results: Study included 541 males and 554 females with mean age of 41.4 +/- 17 years. According to BMI, 40% (n= 438) had normal weighted, 36.6% (n= 401) were overweight and 23.4% (n= 256) were obese. Obesity prevalence was 33.6% (n= 186) in females and 12.9% (n= 70) in males. Central obesity according to waist circumference was diagnosed in 56.2% (n= 309) of females, 15.1% (n= 81) of males, and 35.6% (n= 390) of all participants. BMI was highest in 40-49 age group. There was no BMI difference between the people living in rural and in urban areas. Glucose, total cholesterol, triglycerides, mean systolic and diastolic pressure values were significantly higher in overweight and obese patients. Conclusion: This study has shown that in adults living in Tokat province obesity prevalence is high, there is a correlation between BMI and metabolic risk factors (hypertension, plasma fasting glucose and, hyperlipidemia) and in addition to that central obesity according to waist circumference is much higher. These findings reveal that the frequency of overweight and obese people is increasing in our country and obesity-related metabolic risk factors should be evaluated with a multidisciplinary approach.