This document examines trends in obesity among U.S. adults between 1985 and 2010 using data from the Behavioral Risk Factor Surveillance System. It finds that in 1990, 10 states had obesity prevalence below 10% while no state was at or above 15%; by 2000, no state was below 10% and 23 states were between 20-24%; and by 2010 no state was below 20%, 36 states were at or above 25%, and 12 states were at or above 30%.