Borys Dmytrovych Hrinchenko (Ukrainian: Борис Дмитрович Грінченко, December 9, 1863 – May 6, 1910) was a classical Ukrainian prose writer, political activist, historian, publicist, and ethnographer. He was instrumental in the Ukrainian cultural revival of the late 19th and beginning of the 20th centuries.
Author of the first dictionary of the Ukrainian language together with his wife, Maria Hrinchenko, and editor of a number of Ukrainian periodicals, he advocated the spread of the Ukrainian language in schools and institutions.
Hrinchenko was an editor of various Ukrainian periodicals. He was one of the founders of the Ukrainian Democratic Party. Hrinchenko also was an author of seminal ethnographic, lexicographic, and pedagogical works, literary studies, historical reviews, the first textbooks in the Ukrainian language, particularly Native word, the school-book for reading. He was an editor of the four-volume Словарь української мови (Ukrainian Dictionary; "Kievskaia starina" publishing, Kyiv 1907–1909).
