Olya is a diminutive form of the first name Olga.
Olya may also refer to:
- Olya Ivanisevic, Serbian fashion model
- Olya, Iran (disambiguation), several places in Iran
- Olya, Russia, a rural locality (a selo) in Astrakhan Oblast, Russia
- Olya, meaning "Upper", a common element in Iranian place names; see All pages with titles containing Olya
- Hasan Anami Olya, Iranian opera singer