Daniel Zaitsev (born 13 December 1997) is an Estonian butterfly and freestyle swimmer.

[1] He competed in the men's 50 metre butterfly event at the 2017 World Aquatics Championships.

[2][3] He is a 18-time long course and 26-time short course Estonian swimming champion.

He has broken 27 Estonian records in swimming.

This biographical article related to an Estonian swimmer is a stub.