As of last month, the adult obesity rate in the United States was 27.7% according to Gallup. That's up from last year's 27.1% average, which was the highest annual rate Gallup has measured.
In this animated map that The Atlantic senior editor (and former mental_floss contributor) Dr. James Hamblin shared last April, you can see the rise in obesity by state from 1985-2010. For our purposes, "obese" is defined as a body mass index of 30 or greater. As Dr. Hamblin notes, "BMI isn't an ideal metric to evaluate obesity, but it's still what the U.S. standardly uses."