Middletown, founded in 1832, is the oldest town in Logan County. At one time, Middletown was considered as a location for the capital of Illinois. Middletown was a frequent overnight stop for legislators traveling between Springfield and Peoria in the mid-to-late 19th century. The Stage Coach Inn, located off the town square, is the oldest such wooden structure in Illinois. It is believed that Abraham Lincoln stayed at the Inn. Unfortunately, official records were destroyed in a fire many years ago.