Olga Temonen
- Birthday: 1978-01-23
- Deathday: 2025-11-17
- Place of birth: Nurmes, Finland
- Also know as: Olga Koskikallio
Olga Inkeri Valentina Temonen (né Koskikallio; 23 January 1978 – 17 November 2025) was a Finnish actress and producer. She was best known for her role in the soap drama series Secret Lives. She was married to musician and film director Tuukka Temonen.
