Mykolaiv Raion (disambiguation)

Mykolaiv Raion (Миколаївський район, "Mykolaiv District") may refer to:


 * Mykolaiv Raion, Lviv Oblast, abolished raion in western Ukraine
 * Mykolaiv Raion, Mykolaiv Oblast, southern Ukraine
 * Vitovka Raion, known as Mykolaiv Raion between 1939 and 1944, southern Ukraine.