|Iowa State Fair|
|Dates||11 days (Starts second Thursday of August)|
Iowa State Fairgrounds|
Des Moines, Iowa, United States
(excluding 1898, 1942–1945)
|Attendance||1,130,260 (Record) (2018) |
|Area||445 acres (180 ha)|
|Website||Iowa State Fair Website|
It began in 1854 and has been held on the Iowa State Fairgrounds since 1886. It is based in the state capital Des Moines, Iowa over 11 days in August. With over a million visitors it is one of the largest and best known state fairs in the United States. 
The first Iowa State Fair was staged in Fairfield October 25–27, 1854, with a budget of $323.  The Fair was held again in Fairfield in 1855, then for the next several years, moved from town to town, remaining mostly in eastern Iowa. The Fair was held in Muscatine in 1856–1857, Oskaloosa in 1858–1859, Iowa City in 1860–1861, Dubuque in 1862–1863, Burlington in 1864–1866, Clinton in 1867–1868, Keokuk in 1869–1870 and 1874–1875, and Cedar Rapids in 1871–1873 and 1876–1878.
The Fair moved permanently within the Des Moines city limits in 1878. After the Iowa State Legislature and the City of Des Moines appropriated funds for the Fair in 1886, it moved to its current location at East 30th and East Grand in Des Moines. 
The fair was not held in 1898, due to the celebration of the World's Fair in nearby Omaha, Nebraska, as well as the Spanish–American War, and in 1942–1945 due to World War II, when the state allowed military personnel to use the grounds as a supply depot. 
The fairgrounds are spread over 450 acres (1.8 km2), including 160 acres (0.65 km2) of campsites. 
The fairgrounds are filled with carnival rides and vendors during the fair.
Agricultural contests are held for the largest boar, ram, bull, rabbit and pigeon. There are shows for sheep, swine, beef and dairy cattle, horses, goats, llamas, rabbits, pigeons and dogs. Contests include pigeon rolling, rooster crowing, wood chopping, pie eating, monster arm wrestling, outhouse racing and cow chip throwing.
The butter cow, an Iowa State Fair staple since 1911 when J.K. Daniels sculpted the first one , is located in the Agricultural Building. After sculpting her first butter cow in 1960, Norma "Duffy" Lyon sculpted all six breeds of dairy cows over the next 45 years, as well as Garth Brooks, a butter version of Grant Wood's American Gothic, the Peanuts characters, Iowa native John Wayne, Elvis Presley, a Harley-Davidson motorcycle, various animals and a butter rendition of Leonardo da Vinci's The Last Supper. Lyon was succeeded in 2006 by her longtime apprentice, Sarah Pratt.
The Iowa State Fair has a variety of food, including healthy and gluten-free offerings, from more than 200 food stands. The fair is known for its food on a stick, which numbered over 70 offerings in 2015. Some of the most distinctive are deep fried, including Snickers, Oreos, fried Cokes, cheesecake, pickle dawg (pastrami or ham with cream cheese and pickle), and butter, a popular addition when it was introduced in 2011. Other meat-on-a stick products include pork chop, the most endemic food at the fair, given the state's status as the country's top hog producer, and a bacon-wrapped hot dog dipped in a cornmeal batter.  
The Iowa State Fair grandstand sells tickets to concerts during the event.
Bill Riley's Iowa State Fair Talent Search debuted in 1959 and features Iowans ages 2 to 21. In 1996, Riley retired after 50 Fairs and 37 Fair Talent Shows and the Plaza Stage was renamed the Anne and Bill Riley Stage. He died in December 2006, succeeded by Bill Riley Jr., who has been host since 1997. Nearly 100 local qualifying shows are held across the state. There are seven days of preliminary competition for Sprouts (ages 2–12) and Seniors (ages 13–21), followed by the semi-finals and, ultimately, the selection of a Sprout and Senior champion. The Talent Search is in its 61th year. 
The Iowa State Fair Parade occurs the day before the opening of the State Fair. 
- 2019: August 8–18
- 2020: August 13–23
- 2021: August 12–22
- 2022: August 10–20
- "Trivia - Iowa State Fair". iowastatefair.org.
- Chris Rasmussen, Carnival in the Countryside: The History of the Iowa State Fair (2015).
- "History - Iowa State Fair". iowastatefair.org.
- "Media Guide". iowastatefair.org.
- "General Information". iowastatefair.org.
- "Butter Cow History".
- Fritsch, Jane (August 13, 1023). "At the Fair, Do Calories on a Stick Count?". New York Times. Retrieved 4 August 2013.
- "Iowa State Fair Food". IowaStateFair.org.
- "Bill Riley Talent Search". iowastatefair.org.
- Rasmussen, Chris. Carnival in the Countryside: The History of the Iowa State Fair (University of Iowa Press, 2015). x, 206 pp