If you've ever had a Rice Krispies treat, you can thank a guy from the tiny town Arminto, Wyoming. On May 14, 1918, Hazime Fukuda received a patent for the first rice cereal. His method was later adapted by Kellogg's and has since spawned dozens of popular products.
Before moving to Big Horn in the late 1800s, Oliver Henry Wallop was the Earl of Portsmouth. He later became the only man to serve in both Britain's House of Lords and Wyoming's House of Representatives.