Gergely Csiky (also Gregor Csiky; 8 December 1842 – 19 November 1891) was a Hungarian dramatist.
Csiky was born in Pankota, in the county of Arad. He studied Roman Catholic theology at Pest and Vienna, and was professor in the Priests College at Temesvár from 1870 to 1878. In the latter year, however, he joined the Evangelical Church, and took up literature. Beginning with novels and works on ecclesiastical history, which met with some recognition, he ultimately devoted himself to writing for the stage. Here his success was immediate. In his Az ellenállhatatlan (Irresistible), which obtained a prize from the Hungarian Academy of Sciences, he showed the distinctive features of his talent: directness, freshness, realistic vigor, and highly individual style. In rapid succession he enriched Magyar literature with realistic genre pictures, such as A Proletárok (Proletariat), Buborékok (Bubbles), Két szerelem (Two Loves), A szégyenlős (The Bashful), Athalia, etc., in all of which he seized on one or another feature or type of modern life, dramatizing it with unusual intensity, qualified by chaste and well-balanced diction. Of the latter, his classical studies may, no doubt, be taken as the inspiration, and his translation of Sophocles and Plautus will long rank with the most successful of Magyar translations of the ancient classics. Among the best known of his novels are Arnold, Az Atlasz család (The Atlas Family). He died in Budapest on 19 November 1891.
The Csiky Gergely Theatre of Kaposvár and the Hungarian Theatre of Timişoara bear his name.