The city of Wyoming, Illinois, was founded on May 3, 1836 by General Samuel Thomas (1787-18790) who was a veteran of the War of 1812. He is buried in the Wyoming City Cemetery and there you will find a plaque below his headstone which honors him as the founder and benefactor of the town.
General Thomas is also memorialized by Thomas Park, the main city park, and Thomas Street which both bear his name. Samuel Thomas as well as many of the towns other early settlers came from the state of Pennsylvania.
The town is named for Pennsylvania's Wyoming Valley. The name "Wyoming" comes from a native American word meaning "Large Plains," which seems very appropriate.