Cernavodă (Romanian pronunciation: [t͡ʃernaˈvodə]) is a town in Constanța County, Northern Dobruja, Romania with a population of 15,088 as of 2021.

It houses the Cernavodă Nuclear Power Plant, consisting of two CANDU reactors providing about 18% of Romania's electrical energy output.

Cernavodă was founded under the name Axiopolis by the ancient Greeks in the 4th century BC as a trading post for contacts with local Dacians.

[citation needed] A Roman fort was built as part of the defensive frontier system of the Moesian Limes along the Danube.

At the 2021 census Cernavodă had a population of 15,088 with a majority of Romanians (80.4%) and minorities of Turks (2.23%), Roma (0.66%), Lipovans (0.47%), Tatars (0.15%), Hungarians (0.05%), Bulgarians (0.02%), others (0.7%) and unknown (15.32%).