2021 Glenn County Fair to take place in May The Glenn County Fairgrounds announced the 2021 Glenn County Fair is a go for May 20 through the 23. Posted: Apr 20, 2021 3:47 PM Updated: Apr 20, 2021 3:50 PM Posted By: Deb Anderaos ORLAND, Calif. – The Glenn County Fairgrounds announced the 2021 Glenn County Fair is a go for May 20 through the 23. This year’s theme is a re-do of the canceled 2020 Glenn County Fair “Sweet Delights and Carnival Lights.” Carnival lights and sweet treats are just some of the things coming back to Glenn County in May. Fair planning by the Board of Directors, Staff and Volunteers is in full swing to bring the best annual event in Glenn County.