Cleora is an unincorporated community in Delaware County, Oklahoma, United States, along State Highway 85. The population was 1,113 at the 2000 census. The Cleora Post Office existed from November 28, 1900 until October 15, 1954. Cleora was established in District 2 of the old Indian Territory. It was named for Cleora Ann Lundy, sister of the postmaster, Ed Lunday.