Fort Armstrong Theatre

Fort Armstrong Hotel is a historic building located in downtown Rock Island, Illinois, United States. It was individually listed on the National Register of Historic Places in 1984. In 2020 it was included as a contributing property in the Downtown Rock Island Historic District. The hotel was named for Fort Armstrong, a fortification that sat in the middle of the Mississippi River near the present location of the Rock Island Arsenal. The building now serves as an apartment building.

The Rock Island Public Library is located in downtown Rock Island, Illinois. The Rock Island Public Library traces its beginnings to 1872, making it one the oldest public libraries in Illinois. However, fee-based public libraries started in 1855 in Rock Island and have contributed to the history of Illinois' original library system.

The Sala Apartment Building is a historic building located in Rock Island, Illinois, United States. It was individually listed on the National Register of Historic Places in 2003. In 2020 it was included as a contributing property in the Downtown Rock Island Historic District.

The Downtown Rock Island Historic District is a national historic district encompassing 82.3 acres (33.3 ha) in downtown Rock Island, Illinois. The oldest buildings in the district are from the 1860s, two decades after Rock Island's founding, and buildings from then until 1969 can be found in the district, making it reflective of the city's development over time. The majority of the buildings in the district are commercial buildings, as downtown Rock Island has historically been the city's commercial center; these include several building types, mainly one-part and two-part commercial blocks, designed in a wide variety of the architectural styles popular in the late nineteenth and early to mid twentieth centuries. The district was also historically the center of Rock Island's social life, and many theaters and clubhouses for social organizations can be found in the district. Several of Rock Island's major government buildings, including the city hall and old county courthouse, are also part of the district.The district was added to the National Register of Historic Places on March 13, 2020.

Peoples National Bank Building–Fries Building are two historic buildings located in downtown Rock Island, Illinois, United States. They were listed together on the National Register of Historic Places in 1999. They were included as contributing properties in the Downtown Rock Island Historic District in 2020.The buildings were built separately, but have subsequently been connected on the first three floors.

The Best Building is a historic building located in downtown Rock Island, Illinois, United States. It was built by Louis Best, an industrialist and real estate magnate from Davenport, Iowa in 1908. It was designed by the prominent Davenport architectural firm of Clausen & Clausen in the Renaissance Revival style. The six-story structure is one of the first buildings in the city to be constructed with reinforced concrete. It also had an early form of air-conditioning that utilized a 10-ton ice machine in the basement. The building initially housed the Young & McCombs Department Store, of which Best served as a financier. It is thought that this was the first store outside of Chicago that had a pneumatic tube system for cash transactions. After Young & McCombs the building housed the Brady-Waxenberg Department Store followed by Montgomery Ward. It has subsequently been used as an office building. In 1992 New York artist Richard Haas painted the north elevation of the building with a 60-foot (18 m) tall trompe-l'œil memorial sculpture of local Sauk warrior Black Hawk. The building was individually listed on the National Register of Historic Places in 2018. It was included as a contributing property in the Downtown Rock Island Historic District in 2020.

Lincoln School was a historic building located in Rock Island, Illinois, United States. It was designated a Rock Island Landmark in 1984, individually listed on the National Register of Historic Places in 1985, and became part of the Broadway Historic District when it was listed on the National Register in 1998. It was torn down in 2012 and delisted from the National Register in 2020.

The Connor House is an historic building located in Rock Island, Illinois, United States. It was designated a Rock Island Landmark in 1987. The house was individually listed on the National Register of Historic Places in 1988, and it was included as a contributing property in the Broadway Historic District in 1998.

The Potter House is a historic building located in Rock Island, Illinois, United States. It was designated a Rock Island Landmark in 1987, listed individually on the National Register of Historic Places in 1989, and the house was included as a contributing property in the Broadway Historic District in 1998.

The former First Church of Christ, Scientist, is an historic Christian Science church building located at 700 22nd Street, Rock Island, Illinois, United States. Designed by architect William C. Jones of Chicago in the Palladian style, it was built between 1914-1915. Its exterior walls are of brick covered by Bedford limestone. Its superimposed front portico is supported by six 2 story columns with egg-and-dart capitals. Its dome actually consists of 2 domes: an outer dome and an inner dome which are separated by a space for lighting fixtures and maintenance. The inner dome consists of some 8,000 colored fish scale glass panes on a wooden support structure. The inner dome is similar to the inner dome of First Church of Christ, Scientist in Kalamazoo, Michigan, which was designed by William C. Jones in 1913.The church building, the second one built in Rock Island by the congregation, is a Rock Island Landmark as designated by the city in 1993. It is also a contributing property in the Broadway Historic District, which was added to the National Register of Historic Places on August 14, 1998. It is one of 4 churches in the district and the only Palladian building.

The Quad City Botanical Center is a set of botanical gardens located next to the Mississippi River at 2525 4th Avenue, Rock Island, Illinois. It is open daily except major holidays; an admission fee is charged. The center opened on June 20, 1998. Its gardens include: Sun Garden conservatory (6,444 square feet) - includes sweet acacia, allspice, arrowhead, bamboo, banana, bird of paradise, bromeliads, cacao, cardamom, cassava, coconut, coffee, ferns, frangipani, Arabian jasmine, lychee, orchids, palms, papaya, papyrus, pineapple, sapodilla, vanilla, and ylang-ylang, as well as a 14-foot (4.3 m) waterfall, reflecting pools with koi, and a 70-foot (21 m) skylight. Scott County Regional Authority Conifer Garden (established 2001) - over 40 conifers from the collection of Justin C. Harper, including cultivars such as Ginkgo biloba 'Todd's Broom', Taxus cuspidate 'Fastigiate Aurea', and Thuja standishii. Physically Challenged Garden (established July 2003) - planting beds at varying heights for gardeners with physical limitations. Scrambled Alphabet Garden - for children.

Rock Island Township is located in Rock Island County, Illinois. As of the 2010 census, its population was 17,776 and it contained 7,271 housing units.