Gallup's Alyssa Davis and Diana Liu report that Hawaii is the state with the lowest obesity index at 18.5%, closely followed by Colorado at 19.8%. They are the only two states in which the obesity rate is below 20%, according to the 2015 Gallup-Healthways Well-Being Index.
The national obesity rate reached a new high of 28.0% in 2015, up significantly from 25.5% in 2008, when Gallup and Healthways began tracking obesity. Fourteen states had statistically significant increases in their obesity rates from 2008 to 2015, while no state registered a statistically significant decline. Maine, West Virginia, Idaho and Oklahoma experienced the sharpest upticks in obesity.