In France, the prevalence of urinary incontinence is about 44%. Obesity, defined by a Body Mass Index (BMI) above 30kg/m(2), is well established as a risk factor of stress urinary incontinence. Odds ratio (OR) varies between 1.7 and 2.4. Urge or mixed incontinence also occurs in obesity. Urinary incontinence epidemiology is not well-known in obese women. Weight loss, obtained by a weight reduction diet program or bariatric surgery, improves urinary symptoms of stress, urge or mixed incontinence. Functional outcome of urge incontinence surgery is not influenced by obesity. Typically, functional outcome and morbidity of tension-free vaginal tape are not influenced by BMI variations.