Joseph Duncan House

Beecher Hall is the oldest building on the campus of Illinois College in Jacksonville, Illinois. Built in 1829–30, it was the first college building erected in the state of Illinois. The building has served many functions for Illinois College, including housing the first medical school in Illinois in 1843. It is named after the first president of Illinois College, Edward Beecher. Beecher Hall is recognized by the National Park Service as being a stop on the Underground Railroad. The building is listed on the National Register of Historic Places.

The Illinois School for the Deaf (ISD), located in Jacksonville, Illinois, is a state-operated pre-kindergarten, elementary and high school for the deaf and hard-of-hearing. ISD uses both English and American Sign Language, with a policy modeled after the Wisconsin School for the Deaf.ISD was founded in 1839 in the county seat of Morgan County.The school includes dormitories for its students.

Illinois College is a private liberal arts college in Jacksonville, Illinois. It is affiliated with the United Church of Christ and the Presbyterian Church (USA). It was the second college founded in Illinois but the first to grant a degree (in 1835). It was founded in 1829 by the Yale Band, students from Yale College who traveled westward to found new colleges. It briefly served as the state's first medical school, from 1843 to 1848.

The Jacksonville Historic District is a historic district encompassing 696 buildings in Jacksonville, Illinois. The buildings in the district were mainly constructed from 1829 to the 1930s and represent nearly every popular architectural style from the period. The Greek Revival, Italianate, and Queen Anne styles are especially prevalent in the district. The district includes the campuses of two prominent Jacksonville educational institutions: Illinois College and the Illinois School for the Deaf. Illinois College, the first college in Illinois to grant a degree, was founded in 1829; its first building, Beecher Hall, is the oldest building in the district. The Illinois School for the Deaf was established in 1839 by the Illinois Legislature for the education of hearing-impaired students. Aside from these two institutions, the majority of the district is residential and includes many of Jacksonville's most historically and architecturally significant homes. The district is considered to have retained its historic character well, as 650 of its buildings are considered contributing buildings and the number of recent buildings in the district has been called "remarkably low".The district was added to the National Register of Historic Places on June 9, 1978.

Jacksonville Memorial Hospital (JMH), formerly known as Passavant Area Hospital is located in Jacksonville, Illinois, and has served residents in the following counties since 1875: Morgan, Cass, Greene, Scott, Macoupin, and portions of Brown and northern Pike counties. Jacksonville Memorial Hospital is a twice-designated Magnet hospital and is also accredited by The Joint Commission. Jacksonville Memorial Hospital has approximately 900 employees and a 70 physician medical staff, making it the largest employer in Jacksonville. Jacksonville Memorial Hospital provides inpatient and outpatient services, including rehab and behavioral health services. JMH is an affiliate of Memorial Health System based in Springfield, Illinois.

The Morgan County Courthouse, located at 300 W. State St. in Jacksonville, is the county courthouse of Morgan County, Illinois. The courthouse, the third built in Morgan County, was constructed from 1868 to 1869. Chicago architect Gurdon P. Randall designed the courthouse in a combination of the Italianate and Second Empire styles. The design is considered unusual among county courthouses, as counties generally preferred more traditional designs. Randall's design features an arched loggia surrounding the building's southern entrance, asymmetrical towers at the southern corners with mansard roofs and bracketed cornices, arched dormers within the towers' mansards, and an assortment of round-head and bulls-eye windows. One of the towers houses a 4,000 pounds (1,800 kg) bell, which was intended to be part of a clock that was never installed. A 9-foot (2.7 m) statue of Lady Justice, carved from a single block of pine, originally topped the front entrance; however, after losing its arms around 1872, the statue disappeared in the early 1900s and was never recovered.The courthouse was added to the National Register of Historic Places on November 19, 1986.

Jacksonville is a city in Morgan County, Illinois, United States. The population was 17,616 at the 2020 census, down from 19,446 in 2010. It is the county seat of Morgan County. It is home to Illinois College, Illinois School for the Deaf, and the Illinois School for the Visually Impaired. Jacksonville is the principal city of the Jacksonville Micropolitan Statistical Area, which includes all of Morgan and Scott counties.

The Ayers Bank Building is a historic bank building located at 200 West State Street in Jacksonville, Illinois. This site is believed to have been continuously associated with banking since 1832, longer than any other site in Illinois.

The Jacksonville Public Library is a Carnegie library located at 201 West College Avenue in Jacksonville, Illinois. The library was built in 1902 to house the city's library program, which began in 1870. Chicago architects Patton & Miller designed the Classical Revival building. The building still houses the city's public library and is listed on the National Register of Historic Places.

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

Future Champions Sports Complex, formerly known as Lenz Field, is a multi-field baseball and softball complex in Jacksonville, Illinois.The complex is privately owned by area residents Adam and Kristin Jamison, along with several partners. In a typical tournament season, the complex hosts approximately thirty events, in addition to several standalone college and area high school baseball and softball games. Its estimated yearly impact on the local economy is approximately $3M, according to Jacksonville's mayor, Andy Ezard.

Jacksonville High School (JHS) is a public, coeducational secondary school in Jacksonville, Morgan County, Illinois. It is the sole high school serving Jacksonville School District 117. The schools principal is Joey Dion.