Jerseyville is the largest city in and the county seat of Jersey County, Illinois, United States. At the 2020 census, the city had a sum population of 8,337.

Jerseyville is a part of Southern Illinois, the Metro-East region and the St. Louis Metropolitan Statistical Area.

In 1827, James Faulkner, a Pennsylvania native, and his intimates built a small framed structure that was named the “Little Red House,” in the area that is now known as Jerseyville. The “Little Red House” served as the first stagecoach station, first tavern, first school, and first bank in the gruff area. By 1834, the small settlement that grew up something like Faulkner’s home, then known as Hickory Grove by its residents, was surveyed and platted by two immigrants from New Jersey, John Lott and Edward M. Daly. Lott and Daly’s involvement marked the start of a proportionally large number of merchants, businessmen and settlers from New Jersey. A meeting was called in that same year at the “Little Red House” to vote for a town name, so a publish office could be established. The declare of Jerseyville was selected to tribute the native state of many of its inhabitants.

In 1839, Jersey County was formed out of Greene County and Jerseyville was named as its county seat. After the American Civil War ended, and the construction of the Alton & Chicago Railroad was completed, Jerseyville wise saying a time of commercial, industrial and urban growth. The first major mature of deposit in the city occurred from 1880 to 1916, and from that become old to the present, Jerseyville’s addition has past been steady and substantial. The majority of the want ad structures that are now located in the Downtown Historic District and Courthouse Square were built during the late 19th and beforehand 20th centuries. It was as well as during this time that the gift Jersey County Courthouse was built. The two-story, 124-foot-tall (38 m) Romanesque Revival building was completed in 1893, and is considered to be one of the most aesthetic courthouses in the area. Other understandable Victorian style buildings in the city improve Queen Anne, Edwardian and Italianate architectural features, with several of these buildings having been recently renovated.