The first official Arapahoe County Fair was held in 1906 on the banks of the South Platte River across river from Riverfront in Littleton. Floods, vandalism and neglect took their toll on the original site, and the County Fair was discontinued. 

For almost 40 years, Arapahoe County was without a location for the fairgrounds. Without a home, the County Fair was held in the early ‘40s in any available parking lot during 1945, at the Rio Grande, which is now Bega Park in Littleton. Then, during 1946-1984 came the fair’s first long-term home, the site at Windermere and Belleview.

When the fairgrounds were lost in a land swap in 1985, the Fair Association found a new home at the National Western Complex in Denver. It remained there for five years until a group of volunteers brought it back to the County at the Jockey Club Grounds and Deer Trail School.

In the years following, the Fair was
held in different locations around the County, including the CSU Extension building in Littleton, Castlewood Grange Hall in Englewood, and Quint Valley Fairgrounds in Byers. 

This permanent location for the Arapahoe County Fairgrounds opened in July of 2006 with it's Centennial Celebration. Located at 25690 E. Quincy Ave. in Aurora, the multi-use property serves a variety of uses.