Hajinski is a surname. Notable people with the surname include:
Isa bey Hajinski, Azerbaijani oil magnate Isgandar bey Hajinski, Azerbaijani historian Jamo bey Hajinski, Azerbaijani publicist, theater critic, State Controller and Minister of Transportation, Postal Service and Telegraph of Azerbaijan Democratic Republic Mammad Hasan Hajinski, Azerbaijani statesman and architect Mehdi bey Hajinski, Azerbaijani actor and State Controller within the third cabinet of Azerbaijan Democratic Republic