Remote Delivery of Weight Management for Adults With IDD

Inclusion Criteria: * Diagnosis of mild to moderate IDD as determined by a Community Service Provider operating in Kansas under the auspices of a Community Developmental Disability Organization (CDDO). Participants will be judged competent to provide informed consent by their CDDO, or will have a guardian with power of attorney. * Ability to provide assent, regardless of guardian consent. * BMI of 25 to 45 kg/m2 * Sufficient functional ability to understand directions, communicate preferences (e.g. foods), wants (e.g. more to eat/drink), and needs (e.g. assistance with food preparation) through spoken language * Living at home with a parent/guardian, or in a supported living environment with a caregiver who assists with food shopping, meal planning, and meal preparation and agrees to serve as a study partner * No plans to relocate outside the study area over the next 24 months * Internet access in the home Exclusion Criteria: * Unable to participate in moderate-to-vigorous physical activity (MVPA) * Insulin dependent diabetes * Participation in a weight management program involving diet and physical activity in the past 6 months * Serious food allergies, consuming special diets (vegetarian, Atkins etc.), aversion to common foods (e.g., unwilling to consume dairy products, vegetables), diagnosis of Prader-Willi Syndrome * Pregnancy during the previous 6 months, currently lactating or planned pregnancy in the following 24 months. * Serious medical risk, e.g., cancer, recent heart attack, stroke, angioplasty * Unwilling to be randomized.