Ivan Gregorewitch Olinsky (1878–1962) was a Russian-American painter and art instructor.
Olinsky was born in Elizabethgrad, Russia (now Kirovohrad, Ukraine). After immigrating to the United States at the age of twelve he studied at the National Academy of Design, then worked for the American muralist George Willoughby Maynard, then for Elmer Garnsey, then for John La Farge in Boston until about 1906.
Olinsky became best known for his female portraits in a style that tended towards Impressionism. He was awarded full membership in the National Academy of Design in 1919, and served as an longtime instructor at the Art Students League of New York.
His second daughter Tosca Olinsky (1909-1984) was a notable painter in her own right. Both father and daughter are associated with the Old Lyme Art Colony in Old Lyme, Connecticut. Olinsky's papers reside at the Smithsonian.
- Biographical Notes, a collection of biographical information and images of 50 american artists, containing information about the artist on page 40.
- Two exhibition catalogs, available from the Metropolitan Museum of Art Libraries.