Obesity and its related health problems in people with intellectual disabilities were examined, focusing on differences related to their place of residence. The prevalence of obesity was higher in older women living in community group homes than in the same age group of women living in institutes or among the general population. Hyperglycemia, dyslipidemia, and hypertension were less common in people with intellectual disabilities, especially among people living in institutes when compared with people living in the group homes and with the general population. Abnormal liver tests and hyperuricemia were found more in younger men; these may have resulted from obesity as well as some other clinical factors related to their intellectual disabilities.