Oregon State Fair, Annual state fair in Salem, United States.

The Oregon State Fair is an annual event in Salem spanning multiple buildings and outdoor spaces filled with agricultural exhibits, amusement rides, and entertainment stages. The grounds feature different zones where visitors encounter livestock displays, food vendors, and performance areas throughout the property.

The first official fair was held in 1861 near Oregon City, and the second took place in Salem in 1862 on the Marion County Fair grounds, where it has remained. Homesteader John Savage donated 8 acres and pioneer John Minto gave $1,200 for a wooden fence. The grounds were annexed into Salem in 1921.

The fair's name comes from its role as Oregon's official state fair, held since 1862. Visitors can watch 4-H displays, livestock judging and Oregon crop exhibits, and in 2007 the fair added its first Lucha Libre wrestling event. The heritage oak grove across the street was a Kalapuya gathering place where acorns and camas were collected.

The fairgrounds offer three main parking areas with spaces for people with accessibility needs, connected by regular shuttle services during busy times. Visitors should wear comfortable shoes and bring sun protection, as the grounds are large and require considerable walking in the open.

Two buildings on the grounds are on the National Register of Historic Places: the 1919 horse stadium, Oregon's oldest state building in continuous use, and the 1921 poultry building, whose exterior carries "chicken head" relief sculptures. Both were listed in 2002.