Obesity in Iowa Iowa now has the 12th-highest adult obesity rate in the nation, according to “The State of Obesity: Better Policies for a Healthier America.” Iowa's adult obesity rate is 32.1 percent, up from 20.9 percent in 2000 and from 12.2 percent in 1990. Numbers below are percentages. 0 10 20 30 40 50 60 70 80 90 100 Iowa obesity rate by age (2015) 18-25 26-44 45-64 65+ Iowa obesity rate by race (2015) White Black Latino Iowa obesity rate by gender (2012) Men Women Source: Trust for America's Health and Robert Wood Johnson Foundation Gazette graphic