This study sought to explore the range of beliefs about weight gain and whether these beliefs varied according to personal weight management history. A questionnaire specifically designed for the study was completed by 376 participants (94 males, 282 females; mean age 43.65 years, SD=13.24). Principal component analysis identified five causal attribution factors which were interpreted as Lack-of-Self-Control, Lifestyle-Limitations, Psychological, Biological/Medical, and Modern-Living. The level of endorsement for these causal attribution factors suggested an acknowledgement of the multiple causes to weight gain. However, the most highly endorsed factor, Lack-of-Self Control, reflected the “commonsense” view of weight gain being a matter of overeating, under-exercising and lacking in self control. Personal weight management history was found to be associated with variations in beliefs with the more effort one had applied to weight management; the more highly they endorsed causes both within and outside of individual control.