Mercer County Fairgrounds | |
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| Location | 12th Ave., SW., .5 mi. S of jct. with IL 17, Aledo, Illinois |
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| Coordinates | 41°11′30″N90°45′52″W / 41.19167°N 90.76444°W |
| Area | 52.4 acres (21.2 ha) |
| NRHP reference No. | 97000380 [1] |
| Added to NRHP | May 2, 1997 |
The Mercer County Fairgrounds, located on 12th Avenue SW in Aledo, are the home of the annual county fair in Mercer County, Illinois. The fairgrounds were established in 1869 when the fair moved to Aledo; from its creation in 1853 until then, it had taken place in Millersburg. The early fairs mainly focused on agricultural exhibitions, and the first two buildings were used for horticulture exhibits and household floral shows; these fairs also included entertainment such as baseball games and band concerts. By the end of the century, the fair had grown to host 8,000 visitors, many who came from neighboring counties by train, and show 3,000 entries in its various agricultural competitions. The fair added traveling entertainment and grew to host over 20,000 visitors in the 20th century; it is still held annually at the fairgrounds. In addition to the county fair, the fairgrounds have also held horse races, political events, picnics, and other community events. [2]
The fairgrounds were added to the National Register of Historic Places on May 2, 1997. [1]
Aledo is a city and the county seat of Mercer County, Illinois, United States. The population was 3,633 at the 2020 census.
The North Carolina State Fair is an American state fair and agricultural exposition held annually in Raleigh, North Carolina. Founded in 1853, the fair is organized by the North Carolina Department of Agriculture and Consumer Services. It attracts around a million visitors over eleven days in mid-October.
The Indiana State Fair is an annual state fair that spans 15 days in August in Indianapolis, Indiana, U.S. The Indiana State Fair debuted in 1852 at Military Park in Indianapolis and is the sixth oldest state fair in the U.S. It is the largest event in the state, drawing between 730,000 and 980,000 visitors annually since 2010. In 2015, readers of USA Today ranked the Indiana State Fair among the ten best state fairs in the country.

The New York State Fair, also known as the Great New York State Fair, is a 13-day showcase of agriculture, entertainment, education, and technology. With midway rides, concessionaires, exhibits, and concerts, it has become New York's largest annual event and an end-of-summer tradition for hundreds of thousands of families from all corners of the state. The first fair took place in Syracuse in 1841, and took permanent residence there in 1890. It is the oldest and one of the largest state fairs in the United States, with over one million visitors annually.
The Erie County Fair is a fair held in Hamburg in Erie County, New York, every August. Based on 2018 attendance statistics, The Erie County Fair is the second largest fair in New York and the fourth largest county fair in North America, often drawing over one million in attendance.
Kansas State Fair is a state fair held annually in Hutchinson, Kansas, United States. It starts the Friday following Labor Day in September, and lasts for 10 days. This fair is the largest single event in the state and attracts approximately 350,000 people annually. The fairgrounds is centered at 23rd Ave between Main and Plum Street in Hutchinson, and consists of over 70 buildings on 280 acres (110 ha). It has full-time year-round staff. The 2024 fair will be held from September 6 to 15.
The OC Fair & Event Center (OCFEC) is a 150-acre (0.61 km2) event venue in Costa Mesa, California. The site hosts over 150 events attracting 4.3 million visitors annually, and is home to the Orange County Fair, Centennial Farm, Costa Mesa Speedway, and Pacific Amphitheatre.
The Illinois State Fair is an annual festival, centering on the theme of agriculture, hosted by the U.S. state of Illinois in the state capital, Springfield. The state fair has been celebrated almost every year since 1853. Currently, the fair is held annually at the Illinois State Fairgrounds over an 11-day period in mid-August of each year.
The Missouri State Fair is the state fair for the state of Missouri, which has operated since 1901 in Sedalia, Missouri. It includes daily concerts, exhibits and competitions of animals, homemade crafts, shows, and many food/lemonade stands, and it lasts 11 days. The fairgrounds are located at 2503 W 16th Street on the southwest side of the city at the intersection of West 16th Street and South Limit Avenue.
The Oregon State Fair is the official state fair of the U.S. state of Oregon. It takes place every August–September at the 185-acre (0.75 km2) Oregon State Fairgrounds located in north Salem, the state capital, as it has almost every year since 1862. In 2006, responsibility for running the fair was delegated to the Oregon State Parks and Recreation Department, and the division is now known as the Oregon State Fair & Exposition Center (OSFEC), which holds events on the fairgrounds year-round.
The Big Fresno Fair, founded in 1884, is an annual fair held at the Fresno County Fairgrounds. The Big Fresno Fair is managed by the 21st District Agricultural Association, an entity of the California Department of Food and Agriculture Division of Fairs & Expositions. It is the largest annual event in the San Joaquin Valley, attracting around 600,000 people each October during its twelve-day run featuring exhibits, a livestock show, live horse racing, musical entertainment, educational programs and more. The Fair provides a link between urban and rural California, serving as a tool to educate visitors on the region's rich agricultural industry. The mission of The Big Fresno Fair is to "Educate, Celebrate and Have Fun".
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The Arizona State Fair is an annual state fair, held at Arizona State Fairgrounds.
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The Utah State Fair is held at the Utah State Fairpark in Salt Lake City, Utah, United States. The fairgrounds are listed on the National Register of Historic Places. The fair takes place each year starting on the first Thursday after Labor Day and lasts for 11 days.
The Muscatine County Fairgrounds are located in West Liberty, Iowa, United States. It hosts the annual Muscatine County Fair. The Muscatine County Historic Preservation Commission received a grant from the State of Iowa to study the fairgrounds in 2014. Most of it was listed as a historic district on the National Register of Historic Places as the West Liberty Fairgrounds Historic District in 2015. At the time of its nomination it consisted of 42 resources, which included 16 contributing buildings, two contributing sites, two contributing structures, 16 non-contributing buildings, and six non-contributing structures. Historic tax credits will be used to rehabilitate the historic buildings on the fairgrounds.
The Mercer County Courthouse, located on Southeast 3rd Street in Aledo, is the county courthouse serving Mercer County, Illinois. The courthouse was authorized in 1893 to accommodate the growing county's needs and completed the following year. Architect Mifflin E. Bell designed the Romanesque Revival building; he later expanded upon the same plans to design the DuPage County Courthouse. The three-story sandstone building has arched entrances on all four sides. A clock tower rises above the center of the building, and several dormers project from the sides of the roof.
The Mercer County Jail is a historic county jail building located at 309 South College Avenue in Aledo, Mercer County, Illinois. Completed in 1909, the building was the county's third jail and its second in Aledo. Architect Clair F. Drury of Moline designed the Tudor Revival building. The two-story brick building features terra cotta ornamentation, including quoin-like window surrounds. The building's cross gabled roof has a large gable above the main entrance; both its gables and its dormers are parapeted. The jail served the county until a new jail was completed in 1989; it was later converted to a private business.
The Commercial House is a historic hotel located at the intersection of 5th and Main Streets in Keithsburg, Illinois. William J. Patterson built the hotel to be his own house in 1849; however, he sold it the next year to Samuel Phelps and moved to California, where he died. Indiana native David Wolfe purchased the building and opened it as a public house in 1875.