The CDC's website, as well as the site for the National Institute of Health, has pages and links to important U.S. statistics concerning the overweight and the obese. Both institutions are under the leadership of the U.S. government.
The CDC's statistics are located by selecting the Data & Statistics option in the Diseases & Conditions dropdown. This directs the user to a list of topics on which the CDC keeps statistics; clicking on the Overweight & Obesity link leads to a page of pertinent statistics.
The NIH's statistics are located by accessing NIH.gov and selecting NIDDK in the Institutes at NIH dropdown. This directs the user to the Web page of the National Institute of Diabetes and Digestive and Kidney Diseases. Clicking on Health Statistics in the Health Information dropdown leads to a list of links to statistics about various ailments; selecting Overweight and Obesity shows a link to a page with statistics about U.S. obesity.
Both institutions have extensive information on both child and adult obesity in the United States. The sites mention the chief statistic that one third of the American population is considered obese according to the Body Mass Index. The institutions also provide a breakdown of obesity by age, race and economic status.