Tiksi Bay (Russian: Бухта Тикси, Bukhta Tiksi) is a bay of the Laptev Sea that cuts into the northern part of the Sakha Republic, Russia.

This bay was first surveyed by Russian Arctic explorer Dmitry Laptev in 1739.

[1] There is a cross at Tiksi Bay marking the place of death of U. S. whaling captain Thomas Long.

The Sogo and Yuryage Rivers discharge into the bay.

Semidiurnal tides in the Kola Bay are about 0.3 metres.