Three cities, seven villages, sixteen townships, and thirteen unincorporated places constitute the settlements of Jefferson County located in the northern limit of Marion County and the southern limit of Franklin County. This territory founded in the early years of the 19th century, is part of the Mount Vernon metro area and it has an estimated population of 40400 inhabitants (more than 85% White Non Hispanic) residing over its 585 square miles of extension. Mount Vernon under the zip code 62864, is the county seat of this big community being the home for more than 16000 people and located right between Casey Creek and the Big Muddy River.

Timothy Neubauer, Terry Gamber, and Stephen Sawyer.