About Declo, Idaho
Declo is a city in Cassia County, Idaho, United States. It is part of the Burley, Idaho Micropolitan Statistical Area. The population was 343 at the 2010 census, up from 338 in 2000. The world's largest potato processing company was founded in 1923 near Declo by a 14-year-old entrepreneur named J.R. Simplot, who had moved to the area with his family as a toddler. The corporate headquarters for the J. R. Simplot Company are now located in Boise.