Nina Kovačić (born Nina Ružička, June 7, 1962, Pula, Croatia [Yugoslavia]), Croatian haiku poet. She graduated from the Physics Faculty in Zagreb and works as a geophysics data processing expert at the oil and natural gas company INA Naftaplin; she is a member of Croatian Geological Society. Kovačić writes poetry and has published two haiku collections. She is active in national and international haiku contests, and her work appears in anthologies. She serves on the editorial staff of Iris magazine. She is also a Croatian and Balkans badminton champion and umpire. She lives in Zagreb.