Cornelia Deaderick Glenn (September 4, 1854 – December 9, 1926) was an American society hostess and temperance activist who, as the wife of Robert Broadnax Glenn, served as First Lady of North Carolina from 1905 to 1909. She was involved in the temperance movement and avidly supported her husband's 1908 Prohibition campaign that banned liquor statewide. A devout Presbyterian, she was the founder of one of Winston-Salem's first benevolent societies.