Jacksonville Downtown Historic District
U.S. National Register of Historic Places
U.S. Historic district
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Location	Roughly bounded by Court, West, Morgan, Sandy, Main, Mauvaisterre, and State Sts., Jacksonville, Illinois
Coordinates	39°44′04″N 90°13′48″W / 39.73444°N 90.23000°W / 39.73444; -90.23000
NRHP reference No.	100002915[1]
Added to NRHP	September 14, 2018

The Jacksonville Downtown Historic District is a national historic district in downtown Jacksonville, Illinois. The district encompasses a commercial area surrounding Central Park, the city's public square. Development in the district began in 1825, when Jacksonville was platted and the public square was created; the first buildings on the square were built the same year. Most of the buildings in the district were built between the 1840s and 1940s, and a large number were built during a late nineteenth century building boom. Seven of the buildings were once cigar stores, a reflection of Jacksonville's large cigar making industry. The district includes examples of many of the popular architectural styles of the nineteenth and twentieth centuries; Italianate and Victorian buildings are especially common.^[2]

The district was added to the National Register of Historic Places on September 14, 2018.^[1]