| Ostoja Rajaković | |
| Occupation: | Serbian nobleman in the service of Marko Mrnjavčević |
| Relatives: | Andrea Gropa (father-in-law) |
Ostoja Rajaković (Serbian: Остоја Рајаковић, d. October 1379) was a Serbian nobleman in the service of Marko Mrnjavčević. He governed land around Ohrid. He was the son-in-law of župan (count) Andrea Gropa.[1] He belonged to the Ugarčić family that hailed from Nevesinje.