Mykhailo Mykhailovych Romanchuk (Ukrainian: Михайло Михайлович Романчук; born 7 August 1996, Rivne, Ukraine) is a Ukrainian swimmer.

[2] At the Singapore World Cup leg in October 2016, he set a world cup record of 14:15.49 in the 1500 meter freestyle (short course), breaking the previous record by over 12 seconds.

[4] In the Autumn of 2019, he was member of the inaugural International Swimming League swimming for the Energy Standard, who won the team title in Las Vegas, Nevada, in December.

[5] On 27 July 2021, he set a record for Ukraine with a result of 7:41.28 and reached the final of the 800 meters freestyle at the Tokyo Olympics.

This biographical article related to a Ukrainian swimmer is a stub.