Objective: This study aimed to determine the prevalence of obesity among patients with schizophrenia and its association with the demographic profile. Methods: This is a cross sectional study. Subjects were selected using systematic sampling. Patients attending the out patient psychiatric clinic, Hospital Universiti Kebangsaan Malaysia, who fulfilled the criteria and able to give consent were included in this study. Diagnosis of schizophrenia was made using Structured Clinical Interview (SCID) for DSM-IV. Demographic profiles of the patients were obtained and anthropometric measurements were measured and classified according to Body Mass Index (BMI) and Waist Circumference (WC) of Asian population. Results: A total of 97 patients were included. The prevalence of overweight (BMI: 23.0- 27.4 kg/m2) was 39.2% (n=38), and the prevalence of obesity (BMI: >27.0 kg/m2) was 35.1% (n=34). BMI was higher among non-Chinese (Malay and Indian, p=.03) and those who had low total household income (p=.03). Sixty-two patients (63.9%) had high WC, which was associated with male (p=.003) and non-Chinese (p=.03). Conclusions: Obesity is highly prevalent among patients with schizophrenia. The risk factors for obesity include male, non-Chinese and those with low total income. The high WC among non-Chinese and male patients suggests that they are at a higher risk of developing obesity-related physical illnesses. These findings support that obesity is a common critical issue among schizophrenic patients, and it warrants serious clinical interventions.