Charles Augustus de Kay (July 25, 1848 – May 23, 1935) was a linguist, poet, critic, and fencer. He was a son of George Coleman De Kay, a naval officer. He graduated from Yale College in 1868. He was best known for founding the National Sculpture Society, the Authors' Club, the National Arts Club and the Fencers Club. He was inducted into the United States Fencing Hall of Fame in 2008. He was an art and literary critic for The New York Times for 18 years. He was a co-founder of the Circle of Friends of the Medallion. He also wrote under the pseudonym Henry Eckford.