Sad Chërnoye Ozero, Public park in central Kazan, Russia.

Sad Chërnoye Ozero is a rectangular park in central Kazan, bordered by Dzerzhinsky, Chernyshevsky and Lobachevsky streets. Its western part holds a pond with two high water jets and small red buoys; in winter the pond becomes an ice rink with a skate-rental point nearby. The eastern part is a garden entered through the Arch of Lovers. A pale path runs along the water, and play structures stand on the lawn.

The site began as a natural lake in 1829 and was gradually filled in over several decades, with the transformation completed by 1889. This conversion from water body to landscaped park reflects a shift in how the city organized its central public spaces during that era.

The park hosts regular celebrations of Russian and Tatar traditions, particularly Maslenitsa in spring and the Sabantuy summer festival that draws local communities. These events shape how people gather and use the green space throughout the year.

The park lies in a hollow between Dzerzhinsky Street to the north and south, Chernyshevsky Street to the west and Lobachevsky Street to the east. There are no public transport stops directly beside it; walk down from Pushkin Street stops or from Kremlyovskaya Street. The pond in the western part becomes an ice rink in winter, with a skate rental point nearby.

The Arch of Lovers, also called the Arch of Sighs, was erected in the 1930s at the park's exit to Lobachevsky Street. It is widely believed to have unusual acoustic properties. The wooden fortress playground built in the 1970s was badly damaged by fire and demolished in the mid-1990s.