Karachaus Lagoon (Ukrainian: Карачаус, Romanian: Caraceauş) is a salty lagoon in the Tuzly Lagoons group in Bilhorod-Dnistrovskyi Raion of Odesa Oblast, Ukraine.

Now it is separated from the Alibey Lagoon by the sandbar.

The water body is included to the Tuzly Lagoons National Nature Park.

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