Mykolaivka (Ukrainian: Миколаївка; Russian: Николаевка) is a village in Olhynka settlement hromada, Volnovakha Raion, Donetsk Oblast of eastern Ukraine, at 51.1 kilometres (31.8 mi) south-southwest (SSW) from the centre of Donetsk city.

The settlement had 1,500 inhabitants in 2001. Native language distribution as of the Ukrainian Census of 2001:

• Ukrainian: 85.19%
• Russian: 14.68%
• Armenian and Moldovan (Romanian): 0.07%

• Ivan Dziuba (1931-2022), Ukrainian activist and Soviet dissident