Orpheum Theatre (Sioux City, Iowa)

The Davidson Building is a historic building located in Sioux City, Iowa, United States. It was constructed by local businessmen and real estate developers Ben and Dave Davidson. They saw the need for an upscale office building for professionals. They hired prominent local architect William L. Steele to design the Early Commercial-style structure. It was built by the leading contractor in the city, Lytle Construction Company. Completed in 1913, it was Sioux City's first office building. The exterior of the L-shaped, six-story building is composed of terra cotta panels separated by vertical bands of Roman style brick, and capped with an ornate cornice. It is Sullivanesque in its design. Commercial space is located on the first floor, and office space occupies the upper floors. The building was listed on the National Register of Historic Places in 1999. In 2016 plans were unveiled to convert the building and the adjacent Warrior Hotel into a boutique hotel and apartments. The Davidson Building houses The Warrior Apartments, as well as 56 guest rooms for The Warrior Hotel on its second, third and fourth floors.

The Martin Hotel, erected as a Chicago style building in 1912, is located in Sioux City, Iowa. Added to the National Register of Historic Places in 1983, it is significant for its architecture, operating for many years as the Sheraton-Martin Hotel and now known as the Martin Tower Apartments.

The Warrior Hotel is a historic hotel opened in 1930 and restored in 2020, located in downtown Sioux City, Iowa, United States.

T.S. Martin and Company, also known as Karlton's, Fishgalls & Cameo, is a historic building located in Sioux City, Iowa, United States. It is an L-shaped structure that fronts both Fourth Street and Nebraska Street. It was occupied by one of three locally owned department stores from 1894 to 1919. The buildings on Fourth Street were originally built in 1885. T.S. Martin and Company itself dates from 1880 when Thomas Sanford Martin opened a dry goods store in rented commercial space. He first acquired 515-517 Fourth Street in 1885, which he leased to a clothing store, and his brother Louis opened T.S. Martin and Company Shoes by leasing 519 Fourth Street the same year. Local architect William McLaughlin was hired to renovate 515-17 Fourth and neighboring 519 Fourth Street, and T.S. Martin and Company moved their whole operation in 1894. In 1901 they hired another local architect, Henry Fisher, to design an annex along Nebraska Street. The three-story building completed in 1902 features Beaux-Arts styling that includes a roof-line knee wall, and a cornice with acanthus leaf brackets and decorative swags. Martin's acquired 521 Fourth Street, a mirror image of 519 Fourth Street, in 1904. In 1911 they hired yet another local architect, William L. Steele, to design a completely new facade to unify 515–517, 519 and 521 Fourth Street. Designed in the Prairie School mode, it features white terra cotta, long decorative bands of terra cotta details of foliage and geometric patterns, and Chicago-style windows. After T.S. Martin and Company moved into a new six-story building across Nebraska Street, no longer extant, in 1919 this facility was divided into multiple storefronts and occupied by a variety of commercial enterprises. The 515-517 portion of the Fourth Street facade was covered with a wood face and its cornice removed, before it was significantly altered to its present appearance. T.S. Martin and Company was bought by The May Department Stores Company of St. Louis in 1948. It was the last locally owned department store at the time. The building was listed on the National Register of Historic Places in 1998.

The Williges Building, also known as Cownie-Williges Building, is a historic building located in Sioux City, Iowa, United States. It is a three-story commercial block that was designed by local architects William L. Steele and George Hilgers. The structure was built for August Williges to house his fur manufacturing factory, salesroom, and storage facility. The decorative terra cotta details on the main facade are Sullivanesque in style, which reflects Steele's association with Louis Sullivan from 1897 to 1900. Completed in 1930, it is one of the last commercial buildings constructed in the early Prairie School style in the United States, and Steele's last architectural commission in Sioux City. It was also built at the end of the period of time when terra cotta was popularly used as wall cladding. The building was listed on the National Register of Historic Places in 2007.

The Motor Mart Building, also known as the Commerce Building, is a historic building located in Sioux City, Iowa, United States. It was built by Ralph A. Bennett, who was the owner of Bennett Auto Supply Company. The structure was designed in the style of the Chicago school by E.J. Henriques of the C.F. Lytle Company of Sioux City, who also built the structure. It was initially designed to be two stories tall, but the plans were changed and two more floors were added. It was designed to display, repair and provide parking for automobiles. It was also the first building in Sioux City to incorporate the flat slab system of framing of Claude A.P. Turner, and it was one of the first reinforced, poured concrete buildings in the city. The exterior of the concrete frame structure is clad with glazed brick over common brick infill. The building features terra cotta decorative elements. A.L. Galinsky bought the building in 1919 and converted it into an office building. Its name was changed to the Commerce Building at that time. The Roof Garden was added above the fourth floor from 1921 to 1923. It is a gabled structure covered with stucco. Large Palladian windows line the side walls. The structure housed a ballroom that hosted a variety of social events, and where many big bands played. Lawrence Welk played an early concert here. The building was listed on the National Register of Historic Places in 1993.

The Woodbury County Courthouse is located at 620 Douglas Street in Sioux City, the county seat of Woodbury County, Iowa, United States. It is regarded as "one of the finest Prairie School buildings in the United States" and has been declared a National Historic Landmark for its architecture. It is used for legal proceedings in the county.

The Sioux City Grain Exchange (SCGX) was a cash commodity market in Sioux City, Iowa that primarily traded corn, wheat, oat, and soybean. It was established in 1907 as the Sioux City Board of Trade, named the "fastest growing grain market in the world" in 1929, and among the largest exchanges in the world by the 1970s; transacting over 100 million bushels annually (valued at $1 billion as of 2018). It served the Corn Belt (primarily Iowa, Nebraska, South Dakota, and Minnesota) and primarily competed against the Chicago Mercantile Exchange, Minneapolis Grain Exchange and Kansas City Board of Trade. SCGX's rise and decline was driven by barge navigation of the Missouri River and mirrored the Sioux City Livestock Exchange (Sioux City Stockyards), the largest in the world during the 1970s. Both were co-founded by Vermont banker Fred L. Eaton.

The Federal Building and United States Courthouse is located in Sioux City, Iowa, United States. The present city hall in Sioux City was previously the post office, federal building and courthouse. This building replaced it. It was designed by the local architectural firm of Beuttler & Arnold with the Des Moines firm of Proudfoot, Rawson, Souers & Thomas providing input and oversight. Construction began in 1932 under the direction of the Acting Supervising Architect of the Treasury James A. Wetmore. The building was dedicated on December 29, 1933. The Federal Government had paid $270,000 for the property, and about $725,000 on construction. Architecturally, the three-story, stone structure is a combination of Stripped Classicism and Art Deco. The post office moved to a new facility in 1984, and additional office space and a new courtroom were created in the building. A further renovation was undertaken from 1999 to 2000 and a third courtroom a judge's chamber, jury deliberation room, library, and holding cell for defendants were added. The building was listed on the National Register of Historic Places in 2013.

The Lewis System Armored Car and Detective Service Building, also known as the Bell Tire and Rubber Company (Service Company) and Sioux City Tent and Awning, is a historic building located in Sioux City, Iowa, United States. F.A. Martin and Richard Nash, who owned the property, had this two-story brick commercial building constructed in 1929. KB Construction (Federation Construction Company), who built the building, occupied the second floor. Bell Tire and Rubber Company was the first business located on the first floor from 1930 to 1933. A few other businesses occupied the space until Sioux City Tent and Awning was located here from 1937 to 1941. The following year Lewis System moved in and remained until 1969. The second floor was converted into apartments about 1950. The Lewis System, Inc. was established in 1919 and incorporated in 1922 by Harry Lewis, who grew up in St. Louis and was in the United States Army before he became a railroad detective and moved to Sioux City. By 1930 the company grew to 111 employees and had offices in Sioux Falls, South Dakota, Omaha, Nebraska, Chicago, and Kansas City, Missouri. A large portion of their business was in retail crime, but they also provided security guards for business firms, security checks, and security alarms. After Harry's brother Paul joined him in the late 1930s they added the armored car division. That division opened offices in Des Moines, Waterloo, Fort Dodge, and Cedar Rapids in Iowa and in Sioux Falls. Harry Lewis served as the company president until his death in 1951, and Paul took over from him and continued until his death in 1957. The company was sold to Samartick and Company of Omaha and they operated the business here until 1969. Wells Fargo Armored Car Service took over the building in 1970 and remained here until 1996. The building was listed on the National Register of Historic Places in 2016.

Sioux City Community School District (SCCSD) is a public school district headquartered in the Educational Service Center in Sioux City, Iowa. The district is mostly in Woodbury County, with a portion in Plymouth County.

The Badgerow Building is a historic structure located in downtown Sioux City, Iowa, United States. The building is twelve stories tall and rises 169 feet (52 m) above the ground. It was the tallest building in Sioux City for many years. It was listed on the National Register of Historic Places in 1982. The Badgerow Building was voted one of the 50 Most Significant Iowa Buildings of the 20th Century by the Iowa Chapter of the American Institute of Architects. It was one of five buildings that represented the 1930s.