This study aimed to assess knowledge, attitude and practices among sample of adults in Baghdad Iraq; Ascertain relationship between the knowledge, attitude and practices about obesity and some independent variables and determine the sources of information. Cross sectional study was carried out during the period from 1st of April to the end of October 2021, in Baghdad City in different places where people from different Sociodemographic characteristics, about 253 samples collected from people from different age groups, occupation, education, and residence, data was collected by using a questionnaire. Current study showed male (45.5%) more than females(54.5%), so high frequency of overweight and obesity had been noticed as (11.1%) Moreover, high frequency of central obesity had been found among the studied females & males (depending on waist/ hip ratio as indicatoras (61.1& 51.4) % respectively.so the knowledge for risk factors, weight management food regimen, treatment & success in treatment, diagnosis of obesity, and the lowest score was for the complication of obesity. The difference between the mean score values was significant , as well as lower mean knowledge score values were found among males , participants aged 50+ , occupational group including students & housewives, lower educational level, thin participants, rural and not married in comparison to their counterparts in other; gender, age, occupation, educational level, body mass index, residence and marital status categories respectively, also current study showed negative attitude towards obesity, so subjects with normal BMI had significantly highest score of good attitudes toward obesity. High frequency of overweight and obesity had been noticed among the studied sample, Moreover, high frequency of central obesity had been found among the studied females & males, so the knowledge for risk factors, weight management food regimen, treatment & success in treatment, diagnosis of obesity, as well as negative attitude towards obesity had been found in more than two third of the participants. Subjects with normal BMI had significantly highest score of good attitudes toward obesity, while, the lowest score was noticed in the thin subjects, so significant correlation was noticed between total knowledge score and; educational level, knowledge scores about; risk factor, diagnosis, weight management food regimen, treatment, complication and with scores for good attitudes.