Ilyich may refer to:
- Ilyich, a Russian patronymic meaning "son of Ilya"
- Vladimir Lenin (1870–1924, birth name Vladimir Ilyich Ulyanov), idiomatically referred to by his patronymic
- The former name of Sharur Rayon of Azerbaijan between 1924 and 1990
- Ilyich-Avia, Ukrainian airline
- Ilich Ramírez Sánchez or Carlos the Jackal (born 1949), a terrorist named after Lenin
- Ilyich Rivas (born 1993), Venezuelan conductor